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FAILED: patch "[PATCH] usb: cdnsp: Fix issue with detecting command completion event" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x f4ecdc352646f7d23f348e5c544dbe3212c94fc8 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025061708-cameo-caring-38a0@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From f4ecdc352646f7d23f348e5c544dbe3212c94fc8 Mon Sep 17 00:00:00 2001 From: Pawel Laszczak <pawell(a)cadence.com> Date: Tue, 13 May 2025 05:30:09 +0000 Subject: [PATCH] usb: cdnsp: Fix issue with detecting command completion event In some cases, there is a small-time gap in which CMD_RING_BUSY can be cleared by controller but adding command completion event to event ring will be delayed. As the result driver will return error code. This behavior has been detected on usbtest driver (test 9) with configuration including ep1in/ep1out bulk and ep2in/ep2out isoc endpoint. Probably this gap occurred because controller was busy with adding some other events to event ring. The CMD_RING_BUSY is cleared to '0' when the Command Descriptor has been executed and not when command completion event has been added to event ring. To fix this issue for this test the small delay is sufficient less than 10us) but to make sure the problem doesn't happen again in the future the patch introduces 10 retries to check with delay about 20us before returning error code. Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver") Cc: stable <stable(a)kernel.org> Signed-off-by: Pawel Laszczak <pawell(a)cadence.com> Acked-by: Peter Chen <peter.chen(a)kernel.org> Link: https://lore.kernel.org/r/PH7PR07MB9538AA45362ACCF1B94EE9B7DD96A@PH7PR07MB9… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/cdns3/cdnsp-gadget.c b/drivers/usb/cdns3/cdnsp-gadget.c index cd1e00daf43f..55f95f41b3b4 100644 --- a/drivers/usb/cdns3/cdnsp-gadget.c +++ b/drivers/usb/cdns3/cdnsp-gadget.c @@ -548,6 +548,7 @@ int cdnsp_wait_for_cmd_compl(struct cdnsp_device *pdev) dma_addr_t cmd_deq_dma; union cdnsp_trb *event; u32 cycle_state; + u32 retry = 10; int ret, val; u64 cmd_dma; u32 flags; @@ -579,8 +580,23 @@ int cdnsp_wait_for_cmd_compl(struct cdnsp_device *pdev) flags = le32_to_cpu(event->event_cmd.flags); /* Check the owner of the TRB. */ - if ((flags & TRB_CYCLE) != cycle_state) + if ((flags & TRB_CYCLE) != cycle_state) { + /* + * Give some extra time to get chance controller + * to finish command before returning error code. + * Checking CMD_RING_BUSY is not sufficient because + * this bit is cleared to '0' when the Command + * Descriptor has been executed by controller + * and not when command completion event has + * be added to event ring. + */ + if (retry--) { + udelay(20); + continue; + } + return -EINVAL; + } cmd_dma = le64_to_cpu(event->event_cmd.cmd_trb);

1 week, 6 days

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[PATCH v7 0/5] media: uvcvideo: Introduce V4L2_META_FMT_UVC_MSXU_1_5 + other meta fixes

by Ricardo Ribalda

This series introduces a new metadata format for UVC cameras and adds a couple of improvements to the UVC metadata handling. The new metadata format can be enabled in runtime with quirks. Signed-off-by: Ricardo Ribalda <ribalda(a)chromium.org> --- Changes in v7: - Add patch: Introduce dev->meta_formats - Link to v6: https://lore.kernel.org/r/20250604-uvc-meta-v6-0-7141d48c322c@chromium.org Changes in v6 (Thanks Laurent): - Fix typo in metafmt-uvc.rst - Improve metafmt-uvc-msxu-1-5.rst - uvc_meta_v4l2_try_format() block MSXU format unless the quirk is active - Refactor uvc_enable_msxu - Document uvc_meta_detect_msxu - Rebase series - Add R-b - Link to v5: https://lore.kernel.org/r/20250404-uvc-meta-v5-0-f79974fc2d20@chromium.org Changes in v5: - Fix codestyle and kerneldoc warnings reported by media-ci - Link to v4: https://lore.kernel.org/r/20250403-uvc-meta-v4-0-877aa6475975@chromium.org Changes in v4: - Rename format to V4L2_META_FMT_UVC_MSXU_1_5 (Thanks Mauro) - Flag the new format with a quirk. - Autodetect MSXU devices. - Link to v3: https://lore.kernel.org/linux-media/20250313-uvc-metadata-v3-0-c467af869c60… Changes in v3: - Fix doc syntax errors. - Link to v2: https://lore.kernel.org/r/20250306-uvc-metadata-v2-0-7e939857cad5@chromium.… Changes in v2: - Add metadata invalid fix - Move doc note to a separate patch - Introduce V4L2_META_FMT_UVC_CUSTOM (thanks HdG!). - Link to v1: https://lore.kernel.org/r/20250226-uvc-metadata-v1-1-6cd6fe5ec2cb@chromium.… --- Ricardo Ribalda (5): media: uvcvideo: Do not mark valid metadata as invalid media: Documentation: Add note about UVCH length field media: uvcvideo: Introduce dev->meta_formats media: uvcvideo: Introduce V4L2_META_FMT_UVC_MSXU_1_5 media: uvcvideo: Auto-set UVC_QUIRK_MSXU_META .../userspace-api/media/v4l/meta-formats.rst | 1 + .../media/v4l/metafmt-uvc-msxu-1-5.rst | 23 ++++ .../userspace-api/media/v4l/metafmt-uvc.rst | 4 +- MAINTAINERS | 1 + drivers/media/usb/uvc/uvc_driver.c | 7 ++ drivers/media/usb/uvc/uvc_metadata.c | 133 +++++++++++++++++++-- drivers/media/usb/uvc/uvc_video.c | 12 +- drivers/media/usb/uvc/uvcvideo.h | 3 + drivers/media/v4l2-core/v4l2-ioctl.c | 1 + include/linux/usb/uvc.h | 3 + include/uapi/linux/videodev2.h | 1 + 11 files changed, 175 insertions(+), 14 deletions(-) --- base-commit: c3021d6a80ff05034dfee494115ec71f1954e311 change-id: 20250403-uvc-meta-e556773d12ae Best regards, -- Ricardo Ribalda <ribalda(a)chromium.org>

1 week, 6 days

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Re: Patch "tcp: reorganize tcp_in_ack_event() and tcp_count_delivered()" has been added to the 6.6-stable tree

by Eric Dumazet

On Thu, May 22, 2025 at 3:44 PM Sasha Levin <sashal(a)kernel.org> wrote: > > This is a note to let you know that I've just added the patch titled > > tcp: reorganize tcp_in_ack_event() and tcp_count_delivered() > > to the 6.6-stable tree which can be found at: > http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=sum… > > The filename of the patch is: > tcp-reorganize-tcp_in_ack_event-and-tcp_count_delive.patch > and it can be found in the queue-6.6 subdirectory. > > If you, or anyone else, feels it should not be added to the stable tree, > please let <stable(a)vger.kernel.org> know about it. > > May I ask why this patch was backported to stable versions ? This is causing a packetdrill test to fail. Ilpo, can you take a look ? # packetdrill --ip_version=ipv6 --mtu=1520 dctcp-plb-simple.pkt dctcp-plb-simple.pkt:49: error handling packet: inconsistent flowlabels for this packet: expected: 0x1c50c vs actual: 0xb867c script packet: 0.032224 P.W 5001:6001(1000) ack 1 <nop,nop,TS val 100 ecr 100> actual packet: 0.032209 P.W 5001:6001(1000) ack 1 win 255 <nop,nop,TS val 124 ecr 100> $ cat dctcp-plb-simple.pkt // DCTCP PLB Test // Check that DCTCP rehashes based on PLB congestion conditions `sysctl -qw net/ipv4/tcp_ecn=1 \ net/ipv4/tcp_congestion_control=dctcp \ net/ipv4/tcp_plb_enabled=1 \ net/ipv4/tcp_rmem="4096 131072 15000000"` // Initialize connection 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 +0 bind(3, ..., ...) = 0 +0 listen(3, 1) = 0 // ECN handshake: send EW flags in SYN packet, E flag in SYN-ACK response +0 < SEW 0:0(0) win 32792 <mss 1460,sackOK,TS val 100 ecr 100,nop,wscale 6> +0 > (flowlabel 0x1) SE. 0:0(0) ack 1 <mss 1460,sackOK,TS val 100 ecr 100,nop,wscale 8> +0 < . 1:1(0) ack 1 win 257 +0 accept(3, ..., ...) = 4 +0 getsockopt(4, IPPROTO_TCP, TCP_CONGESTION, "dctcp", [5]) = 0 +0 write(4, ..., 1000) = 1000 +0 > (flowlabel 0x1) P. 1:1001(1000) ack 1 <nop,nop,TS val 100 ecr 100> +0 < . 1:1(0) ack 1001 win 1000 <nop,nop,TS val 100 ecr 100> // no ECN mark, flowlabel won't change. +0 write(4, ..., 1000) = 1000 +0 > (flowlabel 0x1) P. 1001:2001(1000) ack 1 <nop,nop,TS val 100 ecr 100> +0 < . 1:1(0) ack 2001 win 1000 <nop,nop,TS val 100 ecr 100> // No packets ECN-marked. +0 write(4, ..., 1000) = 1000 +0 > (flowlabel 0x1) P. 2001:3001(1000) ack 1 <nop,nop,TS val 100 ecr 100> +0 < E. 1:1(0) ack 3001 win 1000 <nop,nop,TS val 100 ecr 100> // ECN-marked. 1 congested round. +0 write(4, ..., 1000) = 1000 +0 > (flowlabel 0x1) PW. 3001:4001(1000) ack 1 <nop,nop,TS val 100 ecr 100> +0 < E. 1:1(0) ack 4001 win 1000 <nop,nop,TS val 100 ecr 100> // ECN-marked. 2 congested round. +0 write(4, ..., 1000) = 1000 +0 > (flowlabel 0x1) PW. 4001:5001(1000) ack 1 <nop,nop,TS val 100 ecr 100> +0 < E. 1:1(0) ack 5001 win 1000 <nop,nop,TS val 100 ecr 100> // ECN-marked. 3 congested round. +0 write(4, ..., 1000) = 1000 // Flowlabel will change next round +0 > (flowlabel 0x1) PW. 5001:6001(1000) ack 1 <nop,nop,TS val 100 ecr 100> +0 < . 1:1(0) ack 6001 win 1000 <nop,nop,TS val 100 ecr 100> // No packets ECN-marked. 0 congested round. +0 write(4, ..., 1000) = 1000 +0 > (flowlabel 0x2) P. 6001:7001(1000) ack 1 <nop,nop,TS val 100 ecr 100> +0 < . 1:1(0) ack 7001 win 1000 <nop,nop,TS val 100 ecr 100> // No packets ECN-marked. Verify new flowlabel +0 write(4, ..., 1000) = 1000 +0 > (flowlabel 0x2) P. 7001:8001(1000) ack 1 <nop,nop,TS val 100 ecr 100> +0 < . 1:1(0) ack 8001 win 1000 <nop,nop,TS val 100 ecr 100> // No packets ECN-marked. New flowlabel should stick > > commit c39f5ebea6713c908f64e4682c26d144d9a659de > Author: Ilpo Järvinen <ij(a)kernel.org> > Date: Wed Mar 5 23:38:41 2025 +0100 > > tcp: reorganize tcp_in_ack_event() and tcp_count_delivered() > > [ Upstream commit 149dfb31615e22271d2525f078c95ea49bc4db24 ] > > - Move tcp_count_delivered() earlier and split tcp_count_delivered_ce() > out of it > - Move tcp_in_ack_event() later > - While at it, remove the inline from tcp_in_ack_event() and let > the compiler to decide > > Accurate ECN's heuristics does not know if there is going > to be ACE field based CE counter increase or not until after > rtx queue has been processed. Only then the number of ACKed > bytes/pkts is available. As CE or not affects presence of > FLAG_ECE, that information for tcp_in_ack_event is not yet > available in the old location of the call to tcp_in_ack_event(). > > Signed-off-by: Ilpo Järvinen <ij(a)kernel.org> > Signed-off-by: Chia-Yu Chang <chia-yu.chang(a)nokia-bell-labs.com> > Signed-off-by: David S. Miller <davem(a)davemloft.net> > Signed-off-by: Sasha Levin <sashal(a)kernel.org> > > diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c > index 10d38ec0ff5ac..a172248b66783 100644 > --- a/net/ipv4/tcp_input.c > +++ b/net/ipv4/tcp_input.c > @@ -425,6 +425,20 @@ static bool tcp_ecn_rcv_ecn_echo(const struct tcp_sock *tp, const struct tcphdr > return false; > } > > +static void tcp_count_delivered_ce(struct tcp_sock *tp, u32 ecn_count) > +{ > + tp->delivered_ce += ecn_count; > +} > + > +/* Updates the delivered and delivered_ce counts */ > +static void tcp_count_delivered(struct tcp_sock *tp, u32 delivered, > + bool ece_ack) > +{ > + tp->delivered += delivered; > + if (ece_ack) > + tcp_count_delivered_ce(tp, delivered); > +} > + > /* Buffer size and advertised window tuning. > * > * 1. Tuning sk->sk_sndbuf, when connection enters established state. > @@ -1137,15 +1151,6 @@ void tcp_mark_skb_lost(struct sock *sk, struct sk_buff *skb) > } > } > > -/* Updates the delivered and delivered_ce counts */ > -static void tcp_count_delivered(struct tcp_sock *tp, u32 delivered, > - bool ece_ack) > -{ > - tp->delivered += delivered; > - if (ece_ack) > - tp->delivered_ce += delivered; > -} > - > /* This procedure tags the retransmission queue when SACKs arrive. > * > * We have three tag bits: SACKED(S), RETRANS(R) and LOST(L). > @@ -3816,12 +3821,23 @@ static void tcp_process_tlp_ack(struct sock *sk, u32 ack, int flag) > } > } > > -static inline void tcp_in_ack_event(struct sock *sk, u32 flags) > +static void tcp_in_ack_event(struct sock *sk, int flag) > { > const struct inet_connection_sock *icsk = inet_csk(sk); > > - if (icsk->icsk_ca_ops->in_ack_event) > - icsk->icsk_ca_ops->in_ack_event(sk, flags); > + if (icsk->icsk_ca_ops->in_ack_event) { > + u32 ack_ev_flags = 0; > + > + if (flag & FLAG_WIN_UPDATE) > + ack_ev_flags |= CA_ACK_WIN_UPDATE; > + if (flag & FLAG_SLOWPATH) { > + ack_ev_flags |= CA_ACK_SLOWPATH; > + if (flag & FLAG_ECE) > + ack_ev_flags |= CA_ACK_ECE; > + } > + > + icsk->icsk_ca_ops->in_ack_event(sk, ack_ev_flags); > + } > } > > /* Congestion control has updated the cwnd already. So if we're in > @@ -3938,12 +3954,8 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag) > tcp_snd_una_update(tp, ack); > flag |= FLAG_WIN_UPDATE; > > - tcp_in_ack_event(sk, CA_ACK_WIN_UPDATE); > - > NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPHPACKS); > } else { > - u32 ack_ev_flags = CA_ACK_SLOWPATH; > - > if (ack_seq != TCP_SKB_CB(skb)->end_seq) > flag |= FLAG_DATA; > else > @@ -3955,19 +3967,12 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag) > flag |= tcp_sacktag_write_queue(sk, skb, prior_snd_una, > &sack_state); > > - if (tcp_ecn_rcv_ecn_echo(tp, tcp_hdr(skb))) { > + if (tcp_ecn_rcv_ecn_echo(tp, tcp_hdr(skb))) > flag |= FLAG_ECE; > - ack_ev_flags |= CA_ACK_ECE; > - } > > if (sack_state.sack_delivered) > tcp_count_delivered(tp, sack_state.sack_delivered, > flag & FLAG_ECE); > - > - if (flag & FLAG_WIN_UPDATE) > - ack_ev_flags |= CA_ACK_WIN_UPDATE; > - > - tcp_in_ack_event(sk, ack_ev_flags); > } > > /* This is a deviation from RFC3168 since it states that: > @@ -3994,6 +3999,8 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag) > > tcp_rack_update_reo_wnd(sk, &rs); > > + tcp_in_ack_event(sk, flag); > + > if (tp->tlp_high_seq) > tcp_process_tlp_ack(sk, ack, flag); > > @@ -4025,6 +4032,7 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag) > return 1; > > no_queue: > + tcp_in_ack_event(sk, flag); > /* If data was DSACKed, see if we can undo a cwnd reduction. */ > if (flag & FLAG_DSACKING_ACK) { > tcp_fastretrans_alert(sk, prior_snd_una, num_dupack, &flag,

1 week, 6 days

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Revert of a commit in 6.6-stable

by Jens Axboe

Hi Greg and crew, Can you revert: commit 746e7d285dcb96caa1845fbbb62b14bf4010cdfb Author: Jens Axboe <axboe(a)kernel.dk> Date: Wed May 7 08:07:09 2025 -0600 io_uring: ensure deferred completions are posted for multishot in 6.6-stable? There's some missing dependencies that makes this not work right, I'll bring it back in a series instead. -- Jens Axboe

1 week, 6 days

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FAILED: patch "[PATCH] x86/hyperv: Fix APIC ID and VP index confusion in" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 86c48271e0d60c82665e9fd61277002391efcef7 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025061757-refusing-outmatch-70b7@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 86c48271e0d60c82665e9fd61277002391efcef7 Mon Sep 17 00:00:00 2001 From: Roman Kisel <romank(a)linux.microsoft.com> Date: Wed, 7 May 2025 11:22:25 -0700 Subject: [PATCH] x86/hyperv: Fix APIC ID and VP index confusion in hv_snp_boot_ap() To start an application processor in SNP-isolated guest, a hypercall is used that takes a virtual processor index. The hv_snp_boot_ap() function uses that START_VP hypercall but passes as VP index to it what it receives as a wakeup_secondary_cpu_64 callback: the APIC ID. As those two aren't generally interchangeable, that may lead to hung APs if the VP index and the APIC ID don't match up. Update the parameter names to avoid confusion as to what the parameter is. Use the APIC ID to the VP index conversion to provide the correct input to the hypercall. Cc: stable(a)vger.kernel.org Fixes: 44676bb9d566 ("x86/hyperv: Add smp support for SEV-SNP guest") Signed-off-by: Roman Kisel <romank(a)linux.microsoft.com> Reviewed-by: Michael Kelley <mhklinux(a)outlook.com> Link: https://lore.kernel.org/r/20250507182227.7421-2-romank@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu(a)kernel.org> Message-ID: <20250507182227.7421-2-romank(a)linux.microsoft.com> diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index 3b569291dfed..9a8fc144e195 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arch/x86/hyperv/hv_init.c @@ -672,3 +672,36 @@ bool hv_is_hyperv_initialized(void) return hypercall_msr.enable; } EXPORT_SYMBOL_GPL(hv_is_hyperv_initialized); + +int hv_apicid_to_vp_index(u32 apic_id) +{ + u64 control; + u64 status; + unsigned long irq_flags; + struct hv_get_vp_from_apic_id_in *input; + u32 *output, ret; + + local_irq_save(irq_flags); + + input = *this_cpu_ptr(hyperv_pcpu_input_arg); + memset(input, 0, sizeof(*input)); + input->partition_id = HV_PARTITION_ID_SELF; + input->apic_ids[0] = apic_id; + + output = *this_cpu_ptr(hyperv_pcpu_output_arg); + + control = HV_HYPERCALL_REP_COMP_1 | HVCALL_GET_VP_INDEX_FROM_APIC_ID; + status = hv_do_hypercall(control, input, output); + ret = output[0]; + + local_irq_restore(irq_flags); + + if (!hv_result_success(status)) { + pr_err("failed to get vp index from apic id %d, status %#llx\n", + apic_id, status); + return -EINVAL; + } + + return ret; +} +EXPORT_SYMBOL_GPL(hv_apicid_to_vp_index); diff --git a/arch/x86/hyperv/hv_vtl.c b/arch/x86/hyperv/hv_vtl.c index ac3d27a766d5..2f32ac1ae40e 100644 --- a/arch/x86/hyperv/hv_vtl.c +++ b/arch/x86/hyperv/hv_vtl.c @@ -211,41 +211,9 @@ static int hv_vtl_bringup_vcpu(u32 target_vp_index, int cpu, u64 eip_ignored) return ret; } -static int hv_vtl_apicid_to_vp_id(u32 apic_id) -{ - u64 control; - u64 status; - unsigned long irq_flags; - struct hv_get_vp_from_apic_id_in *input; - u32 *output, ret; - - local_irq_save(irq_flags); - - input = *this_cpu_ptr(hyperv_pcpu_input_arg); - memset(input, 0, sizeof(*input)); - input->partition_id = HV_PARTITION_ID_SELF; - input->apic_ids[0] = apic_id; - - output = *this_cpu_ptr(hyperv_pcpu_output_arg); - - control = HV_HYPERCALL_REP_COMP_1 | HVCALL_GET_VP_ID_FROM_APIC_ID; - status = hv_do_hypercall(control, input, output); - ret = output[0]; - - local_irq_restore(irq_flags); - - if (!hv_result_success(status)) { - pr_err("failed to get vp id from apic id %d, status %#llx\n", - apic_id, status); - return -EINVAL; - } - - return ret; -} - static int hv_vtl_wakeup_secondary_cpu(u32 apicid, unsigned long start_eip) { - int vp_id, cpu; + int vp_index, cpu; /* Find the logical CPU for the APIC ID */ for_each_present_cpu(cpu) { @@ -256,18 +224,18 @@ static int hv_vtl_wakeup_secondary_cpu(u32 apicid, unsigned long start_eip) return -EINVAL; pr_debug("Bringing up CPU with APIC ID %d in VTL2...\n", apicid); - vp_id = hv_vtl_apicid_to_vp_id(apicid); + vp_index = hv_apicid_to_vp_index(apicid); - if (vp_id < 0) { + if (vp_index < 0) { pr_err("Couldn't find CPU with APIC ID %d\n", apicid); return -EINVAL; } - if (vp_id > ms_hyperv.max_vp_index) { - pr_err("Invalid CPU id %d for APIC ID %d\n", vp_id, apicid); + if (vp_index > ms_hyperv.max_vp_index) { + pr_err("Invalid CPU id %d for APIC ID %d\n", vp_index, apicid); return -EINVAL; } - return hv_vtl_bringup_vcpu(vp_id, cpu, start_eip); + return hv_vtl_bringup_vcpu(vp_index, cpu, start_eip); } int __init hv_vtl_early_init(void) diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c index 77bf05f06b9e..0cc239cdb4da 100644 --- a/arch/x86/hyperv/ivm.c +++ b/arch/x86/hyperv/ivm.c @@ -9,6 +9,7 @@ #include <linux/bitfield.h> #include <linux/types.h> #include <linux/slab.h> +#include <linux/cpu.h> #include <asm/svm.h> #include <asm/sev.h> #include <asm/io.h> @@ -288,7 +289,7 @@ static void snp_cleanup_vmsa(struct sev_es_save_area *vmsa) free_page((unsigned long)vmsa); } -int hv_snp_boot_ap(u32 cpu, unsigned long start_ip) +int hv_snp_boot_ap(u32 apic_id, unsigned long start_ip) { struct sev_es_save_area *vmsa = (struct sev_es_save_area *) __get_free_page(GFP_KERNEL | __GFP_ZERO); @@ -297,10 +298,27 @@ int hv_snp_boot_ap(u32 cpu, unsigned long start_ip) u64 ret, retry = 5; struct hv_enable_vp_vtl *start_vp_input; unsigned long flags; + int cpu, vp_index; if (!vmsa) return -ENOMEM; + /* Find the Hyper-V VP index which might be not the same as APIC ID */ + vp_index = hv_apicid_to_vp_index(apic_id); + if (vp_index < 0 || vp_index > ms_hyperv.max_vp_index) + return -EINVAL; + + /* + * Find the Linux CPU number for addressing the per-CPU data, and it + * might not be the same as APIC ID. + */ + for_each_present_cpu(cpu) { + if (arch_match_cpu_phys_id(cpu, apic_id)) + break; + } + if (cpu >= nr_cpu_ids) + return -EINVAL; + native_store_gdt(&gdtr); vmsa->gdtr.base = gdtr.address; @@ -348,7 +366,7 @@ int hv_snp_boot_ap(u32 cpu, unsigned long start_ip) start_vp_input = (struct hv_enable_vp_vtl *)ap_start_input_arg; memset(start_vp_input, 0, sizeof(*start_vp_input)); start_vp_input->partition_id = -1; - start_vp_input->vp_index = cpu; + start_vp_input->vp_index = vp_index; start_vp_input->target_vtl.target_vtl = ms_hyperv.vtl; *(u64 *)&start_vp_input->vp_context = __pa(vmsa) | 1; diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index bab5ccfc60a7..0b9a3a307d06 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -268,11 +268,11 @@ int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry); #ifdef CONFIG_AMD_MEM_ENCRYPT bool hv_ghcb_negotiate_protocol(void); void __noreturn hv_ghcb_terminate(unsigned int set, unsigned int reason); -int hv_snp_boot_ap(u32 cpu, unsigned long start_ip); +int hv_snp_boot_ap(u32 apic_id, unsigned long start_ip); #else static inline bool hv_ghcb_negotiate_protocol(void) { return false; } static inline void hv_ghcb_terminate(unsigned int set, unsigned int reason) {} -static inline int hv_snp_boot_ap(u32 cpu, unsigned long start_ip) { return 0; } +static inline int hv_snp_boot_ap(u32 apic_id, unsigned long start_ip) { return 0; } #endif #if defined(CONFIG_AMD_MEM_ENCRYPT) || defined(CONFIG_INTEL_TDX_GUEST) @@ -306,6 +306,7 @@ static __always_inline u64 hv_raw_get_msr(unsigned int reg) { return __rdmsr(reg); } +int hv_apicid_to_vp_index(u32 apic_id); #else /* CONFIG_HYPERV */ static inline void hyperv_init(void) {} @@ -327,6 +328,7 @@ static inline void hv_set_msr(unsigned int reg, u64 value) { } static inline u64 hv_get_msr(unsigned int reg) { return 0; } static inline void hv_set_non_nested_msr(unsigned int reg, u64 value) { } static inline u64 hv_get_non_nested_msr(unsigned int reg) { return 0; } +static inline int hv_apicid_to_vp_index(u32 apic_id) { return -EINVAL; } #endif /* CONFIG_HYPERV */ diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h index cf0923dc727d..2d431b53f587 100644 --- a/include/hyperv/hvgdk_mini.h +++ b/include/hyperv/hvgdk_mini.h @@ -475,7 +475,7 @@ union hv_vp_assist_msr_contents { /* HV_REGISTER_VP_ASSIST_PAGE */ #define HVCALL_CREATE_PORT 0x0095 #define HVCALL_CONNECT_PORT 0x0096 #define HVCALL_START_VP 0x0099 -#define HVCALL_GET_VP_ID_FROM_APIC_ID 0x009a +#define HVCALL_GET_VP_INDEX_FROM_APIC_ID 0x009a #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE 0x00af #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_LIST 0x00b0 #define HVCALL_SIGNAL_EVENT_DIRECT 0x00c0

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FAILED: patch "[PATCH] x86/hyperv: Fix APIC ID and VP index confusion in" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x 86c48271e0d60c82665e9fd61277002391efcef7 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025061756-shale-squiggly-9c9a@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 86c48271e0d60c82665e9fd61277002391efcef7 Mon Sep 17 00:00:00 2001 From: Roman Kisel <romank(a)linux.microsoft.com> Date: Wed, 7 May 2025 11:22:25 -0700 Subject: [PATCH] x86/hyperv: Fix APIC ID and VP index confusion in hv_snp_boot_ap() To start an application processor in SNP-isolated guest, a hypercall is used that takes a virtual processor index. The hv_snp_boot_ap() function uses that START_VP hypercall but passes as VP index to it what it receives as a wakeup_secondary_cpu_64 callback: the APIC ID. As those two aren't generally interchangeable, that may lead to hung APs if the VP index and the APIC ID don't match up. Update the parameter names to avoid confusion as to what the parameter is. Use the APIC ID to the VP index conversion to provide the correct input to the hypercall. Cc: stable(a)vger.kernel.org Fixes: 44676bb9d566 ("x86/hyperv: Add smp support for SEV-SNP guest") Signed-off-by: Roman Kisel <romank(a)linux.microsoft.com> Reviewed-by: Michael Kelley <mhklinux(a)outlook.com> Link: https://lore.kernel.org/r/20250507182227.7421-2-romank@linux.microsoft.com Signed-off-by: Wei Liu <wei.liu(a)kernel.org> Message-ID: <20250507182227.7421-2-romank(a)linux.microsoft.com> diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index 3b569291dfed..9a8fc144e195 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arch/x86/hyperv/hv_init.c @@ -672,3 +672,36 @@ bool hv_is_hyperv_initialized(void) return hypercall_msr.enable; } EXPORT_SYMBOL_GPL(hv_is_hyperv_initialized); + +int hv_apicid_to_vp_index(u32 apic_id) +{ + u64 control; + u64 status; + unsigned long irq_flags; + struct hv_get_vp_from_apic_id_in *input; + u32 *output, ret; + + local_irq_save(irq_flags); + + input = *this_cpu_ptr(hyperv_pcpu_input_arg); + memset(input, 0, sizeof(*input)); + input->partition_id = HV_PARTITION_ID_SELF; + input->apic_ids[0] = apic_id; + + output = *this_cpu_ptr(hyperv_pcpu_output_arg); + + control = HV_HYPERCALL_REP_COMP_1 | HVCALL_GET_VP_INDEX_FROM_APIC_ID; + status = hv_do_hypercall(control, input, output); + ret = output[0]; + + local_irq_restore(irq_flags); + + if (!hv_result_success(status)) { + pr_err("failed to get vp index from apic id %d, status %#llx\n", + apic_id, status); + return -EINVAL; + } + + return ret; +} +EXPORT_SYMBOL_GPL(hv_apicid_to_vp_index); diff --git a/arch/x86/hyperv/hv_vtl.c b/arch/x86/hyperv/hv_vtl.c index ac3d27a766d5..2f32ac1ae40e 100644 --- a/arch/x86/hyperv/hv_vtl.c +++ b/arch/x86/hyperv/hv_vtl.c @@ -211,41 +211,9 @@ static int hv_vtl_bringup_vcpu(u32 target_vp_index, int cpu, u64 eip_ignored) return ret; } -static int hv_vtl_apicid_to_vp_id(u32 apic_id) -{ - u64 control; - u64 status; - unsigned long irq_flags; - struct hv_get_vp_from_apic_id_in *input; - u32 *output, ret; - - local_irq_save(irq_flags); - - input = *this_cpu_ptr(hyperv_pcpu_input_arg); - memset(input, 0, sizeof(*input)); - input->partition_id = HV_PARTITION_ID_SELF; - input->apic_ids[0] = apic_id; - - output = *this_cpu_ptr(hyperv_pcpu_output_arg); - - control = HV_HYPERCALL_REP_COMP_1 | HVCALL_GET_VP_ID_FROM_APIC_ID; - status = hv_do_hypercall(control, input, output); - ret = output[0]; - - local_irq_restore(irq_flags); - - if (!hv_result_success(status)) { - pr_err("failed to get vp id from apic id %d, status %#llx\n", - apic_id, status); - return -EINVAL; - } - - return ret; -} - static int hv_vtl_wakeup_secondary_cpu(u32 apicid, unsigned long start_eip) { - int vp_id, cpu; + int vp_index, cpu; /* Find the logical CPU for the APIC ID */ for_each_present_cpu(cpu) { @@ -256,18 +224,18 @@ static int hv_vtl_wakeup_secondary_cpu(u32 apicid, unsigned long start_eip) return -EINVAL; pr_debug("Bringing up CPU with APIC ID %d in VTL2...\n", apicid); - vp_id = hv_vtl_apicid_to_vp_id(apicid); + vp_index = hv_apicid_to_vp_index(apicid); - if (vp_id < 0) { + if (vp_index < 0) { pr_err("Couldn't find CPU with APIC ID %d\n", apicid); return -EINVAL; } - if (vp_id > ms_hyperv.max_vp_index) { - pr_err("Invalid CPU id %d for APIC ID %d\n", vp_id, apicid); + if (vp_index > ms_hyperv.max_vp_index) { + pr_err("Invalid CPU id %d for APIC ID %d\n", vp_index, apicid); return -EINVAL; } - return hv_vtl_bringup_vcpu(vp_id, cpu, start_eip); + return hv_vtl_bringup_vcpu(vp_index, cpu, start_eip); } int __init hv_vtl_early_init(void) diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c index 77bf05f06b9e..0cc239cdb4da 100644 --- a/arch/x86/hyperv/ivm.c +++ b/arch/x86/hyperv/ivm.c @@ -9,6 +9,7 @@ #include <linux/bitfield.h> #include <linux/types.h> #include <linux/slab.h> +#include <linux/cpu.h> #include <asm/svm.h> #include <asm/sev.h> #include <asm/io.h> @@ -288,7 +289,7 @@ static void snp_cleanup_vmsa(struct sev_es_save_area *vmsa) free_page((unsigned long)vmsa); } -int hv_snp_boot_ap(u32 cpu, unsigned long start_ip) +int hv_snp_boot_ap(u32 apic_id, unsigned long start_ip) { struct sev_es_save_area *vmsa = (struct sev_es_save_area *) __get_free_page(GFP_KERNEL | __GFP_ZERO); @@ -297,10 +298,27 @@ int hv_snp_boot_ap(u32 cpu, unsigned long start_ip) u64 ret, retry = 5; struct hv_enable_vp_vtl *start_vp_input; unsigned long flags; + int cpu, vp_index; if (!vmsa) return -ENOMEM; + /* Find the Hyper-V VP index which might be not the same as APIC ID */ + vp_index = hv_apicid_to_vp_index(apic_id); + if (vp_index < 0 || vp_index > ms_hyperv.max_vp_index) + return -EINVAL; + + /* + * Find the Linux CPU number for addressing the per-CPU data, and it + * might not be the same as APIC ID. + */ + for_each_present_cpu(cpu) { + if (arch_match_cpu_phys_id(cpu, apic_id)) + break; + } + if (cpu >= nr_cpu_ids) + return -EINVAL; + native_store_gdt(&gdtr); vmsa->gdtr.base = gdtr.address; @@ -348,7 +366,7 @@ int hv_snp_boot_ap(u32 cpu, unsigned long start_ip) start_vp_input = (struct hv_enable_vp_vtl *)ap_start_input_arg; memset(start_vp_input, 0, sizeof(*start_vp_input)); start_vp_input->partition_id = -1; - start_vp_input->vp_index = cpu; + start_vp_input->vp_index = vp_index; start_vp_input->target_vtl.target_vtl = ms_hyperv.vtl; *(u64 *)&start_vp_input->vp_context = __pa(vmsa) | 1; diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index bab5ccfc60a7..0b9a3a307d06 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -268,11 +268,11 @@ int hv_unmap_ioapic_interrupt(int ioapic_id, struct hv_interrupt_entry *entry); #ifdef CONFIG_AMD_MEM_ENCRYPT bool hv_ghcb_negotiate_protocol(void); void __noreturn hv_ghcb_terminate(unsigned int set, unsigned int reason); -int hv_snp_boot_ap(u32 cpu, unsigned long start_ip); +int hv_snp_boot_ap(u32 apic_id, unsigned long start_ip); #else static inline bool hv_ghcb_negotiate_protocol(void) { return false; } static inline void hv_ghcb_terminate(unsigned int set, unsigned int reason) {} -static inline int hv_snp_boot_ap(u32 cpu, unsigned long start_ip) { return 0; } +static inline int hv_snp_boot_ap(u32 apic_id, unsigned long start_ip) { return 0; } #endif #if defined(CONFIG_AMD_MEM_ENCRYPT) || defined(CONFIG_INTEL_TDX_GUEST) @@ -306,6 +306,7 @@ static __always_inline u64 hv_raw_get_msr(unsigned int reg) { return __rdmsr(reg); } +int hv_apicid_to_vp_index(u32 apic_id); #else /* CONFIG_HYPERV */ static inline void hyperv_init(void) {} @@ -327,6 +328,7 @@ static inline void hv_set_msr(unsigned int reg, u64 value) { } static inline u64 hv_get_msr(unsigned int reg) { return 0; } static inline void hv_set_non_nested_msr(unsigned int reg, u64 value) { } static inline u64 hv_get_non_nested_msr(unsigned int reg) { return 0; } +static inline int hv_apicid_to_vp_index(u32 apic_id) { return -EINVAL; } #endif /* CONFIG_HYPERV */ diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h index cf0923dc727d..2d431b53f587 100644 --- a/include/hyperv/hvgdk_mini.h +++ b/include/hyperv/hvgdk_mini.h @@ -475,7 +475,7 @@ union hv_vp_assist_msr_contents { /* HV_REGISTER_VP_ASSIST_PAGE */ #define HVCALL_CREATE_PORT 0x0095 #define HVCALL_CONNECT_PORT 0x0096 #define HVCALL_START_VP 0x0099 -#define HVCALL_GET_VP_ID_FROM_APIC_ID 0x009a +#define HVCALL_GET_VP_INDEX_FROM_APIC_ID 0x009a #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE 0x00af #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_LIST 0x00b0 #define HVCALL_SIGNAL_EVENT_DIRECT 0x00c0

1 week, 6 days

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FAILED: patch "[PATCH] xfs: don't assume perags are initialised when trimming AGs" failed to apply to 6.6-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 23be716b1c4f3f3a6c00ee38d51a57ef7db9ef7d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025061709-overboard-duplicate-5035@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 23be716b1c4f3f3a6c00ee38d51a57ef7db9ef7d Mon Sep 17 00:00:00 2001 From: Dave Chinner <dchinner(a)redhat.com> Date: Thu, 1 May 2025 09:27:24 +1000 Subject: [PATCH] xfs: don't assume perags are initialised when trimming AGs When running fstrim immediately after mounting a V4 filesystem, the fstrim fails to trim all the free space in the filesystem. It only trims the first extent in the by-size free space tree in each AG and then returns. If a second fstrim is then run, it runs correctly and the entire free space in the filesystem is iterated and discarded correctly. The problem lies in the setup of the trim cursor - it assumes that pag->pagf_longest is valid without either reading the AGF first or checking if xfs_perag_initialised_agf(pag) is true or not. As a result, when a filesystem is mounted without reading the AGF (e.g. a clean mount on a v4 filesystem) and the first operation is a fstrim call, pag->pagf_longest is zero and so the free extent search starts at the wrong end of the by-size btree and exits after discarding the first record in the tree. Fix this by deferring the initialisation of tcur->count to after we have locked the AGF and guaranteed that the perag is properly initialised. We trigger this on tcur->count == 0 after locking the AGF, as this will only occur on the first call to xfs_trim_gather_extents() for each AG. If we need to iterate, tcur->count will be set to the length of the record we need to restart at, so we can use this to ensure we only sample a valid pag->pagf_longest value for the iteration. Signed-off-by: Dave Chinner <dchinner(a)redhat.com> Reviewed-by: Bill O'Donnell <bodonnel(a)redhat.com> Reviewed-by: Darrick J. Wong <djwong(a)kernel.org> Fixes: 89cfa899608f ("xfs: reduce AGF hold times during fstrim operations") Cc: <stable(a)vger.kernel.org> # v6.6 Signed-off-by: Carlos Maiolino <cem(a)kernel.org> diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c index c1a306268ae4..94d0873bcd62 100644 --- a/fs/xfs/xfs_discard.c +++ b/fs/xfs/xfs_discard.c @@ -167,6 +167,14 @@ xfs_discard_extents( return error; } +/* + * Care must be taken setting up the trim cursor as the perags may not have been + * initialised when the cursor is initialised. e.g. a clean mount which hasn't + * read in AGFs and the first operation run on the mounted fs is a trim. This + * can result in perag fields that aren't initialised until + * xfs_trim_gather_extents() calls xfs_alloc_read_agf() to lock down the AG for + * the free space search. + */ struct xfs_trim_cur { xfs_agblock_t start; xfs_extlen_t count; @@ -204,6 +212,14 @@ xfs_trim_gather_extents( if (error) goto out_trans_cancel; + /* + * First time through tcur->count will not have been initialised as + * pag->pagf_longest is not guaranteed to be valid before we read + * the AGF buffer above. + */ + if (!tcur->count) + tcur->count = pag->pagf_longest; + if (tcur->by_bno) { /* sub-AG discard request always starts at tcur->start */ cur = xfs_bnobt_init_cursor(mp, tp, agbp, pag); @@ -350,7 +366,6 @@ xfs_trim_perag_extents( { struct xfs_trim_cur tcur = { .start = start, - .count = pag->pagf_longest, .end = end, .minlen = minlen, };

1 week, 6 days

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FAILED: patch "[PATCH] usb: typec: tcpm/tcpci_maxim: Fix bounds check in" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 0736299d090f5c6a1032678705c4bc0a9511a3db # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025061709-nacho-bronchial-18a8@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 0736299d090f5c6a1032678705c4bc0a9511a3db Mon Sep 17 00:00:00 2001 From: Amit Sunil Dhamne <amitsd(a)google.com> Date: Fri, 2 May 2025 16:57:03 -0700 Subject: [PATCH] usb: typec: tcpm/tcpci_maxim: Fix bounds check in process_rx() Register read of TCPC_RX_BYTE_CNT returns the total size consisting of: PD message (pending read) size + 1 Byte for Frame Type (SOP*) This is validated against the max PD message (`struct pd_message`) size without accounting for the extra byte for the frame type. Note that the struct pd_message does not contain a field for the frame_type. This results in false negatives when the "PD message (pending read)" is equal to the max PD message size. Fixes: 6f413b559f86 ("usb: typec: tcpci_maxim: Chip level TCPC driver") Signed-off-by: Amit Sunil Dhamne <amitsd(a)google.com> Signed-off-by: Badhri Jagan Sridharan <badhri(a)google.com> Reviewed-by: Kyle Tso <kyletso(a)google.com> Cc: stable <stable(a)kernel.org> Link: https://lore.kernel.org/stable/20250502-b4-new-fix-pd-rx-count-v1-1-e5711ed… Reviewed-by: Heikki Krogerus <heikki.krogerus(a)linux.intel.com> Link: https://lore.kernel.org/r/20250502-b4-new-fix-pd-rx-count-v1-1-e5711ed09b3d… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/typec/tcpm/tcpci_maxim_core.c b/drivers/usb/typec/tcpm/tcpci_maxim_core.c index 29a4aa89d1a1..b5a5ed40faea 100644 --- a/drivers/usb/typec/tcpm/tcpci_maxim_core.c +++ b/drivers/usb/typec/tcpm/tcpci_maxim_core.c @@ -166,7 +166,8 @@ static void process_rx(struct max_tcpci_chip *chip, u16 status) return; } - if (count > sizeof(struct pd_message) || count + 1 > TCPC_RECEIVE_BUFFER_LEN) { + if (count > sizeof(struct pd_message) + 1 || + count + 1 > TCPC_RECEIVE_BUFFER_LEN) { dev_err(chip->dev, "Invalid TCPC_RX_BYTE_CNT %d\n", count); return; }

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[PATCH v8 0/4] media: pisp-be: Split jobs creation and scheduling

by Jacopo Mondi

Currently the 'pispbe_schedule()' function does two things: 1) Tries to assemble a job by inspecting all the video node queues to make sure all the required buffers are available 2) Submit the job to the hardware The pispbe_schedule() function is called at: - video device start_streaming() time - video device qbuf() time - irq handler As assembling a job requires inspecting all queues, it is a rather time consuming operation which is better not run in IRQ context. To avoid executing the time consuming job creation in interrupt context, split the job creation and job scheduling in two distinct operations. When a well-formed job is created, append it to the newly introduced 'pispbe->job_queue' where it will be dequeued from by the scheduling routine. At start_streaming() and qbuf() time immediately try to schedule a job if one has been created as the irq handler routine is only called when a job has completed, and we can't solely rely on it for scheduling new jobs. Signed-off-by: Jacopo Mondi <jacopo.mondi(a)ideasonboard.com> --- Changes in v8: - Use automatic release of *job in pispbe_prepare_job() - Use temporary list to release jobs without holding the main driver lock - Collect tags - Rebased on rpi-6.6.y: https://github.com/raspberrypi/linux/pull/6905 - Link to v7: https://lore.kernel.org/r/20250606-pispbe-mainline-split-jobs-handling-v6-v… Changes in v7: - Rebased on media-committers/next - Fix lockdep warning by using the proper spinlock_irq() primitive in pispbe_prepare_job() which can race with the IRQ handler - Link to v6: https://lore.kernel.org/r/20240930-pispbe-mainline-split-jobs-handling-v6-v… v5->v6: - Make the driver depend on PM - Simplify the probe() routine by using pm_runtime_ - Remove suspend call from remove() v4->v5: - Use appropriate locking constructs: - spin_lock_irq() for pispbe_prepare_job() called from non irq context - spin_lock_irqsave() for pispbe_schedule() called from irq context - Remove hw_lock from ready_queue accesses in stop_streaming and start_streaming - Fix trivial indentation mistake in 4/4 v3->v4: - Expand commit message in 2/4 to explain why removing validation in schedule() is safe - Drop ready_lock spinlock - Use non _irqsave version of safe_guard(spinlock - Support !CONFIG_PM in 4/4 by calling the enable/disable routines directly and adjust pm_runtime usage as suggested by Laurent v2->v3: - Mark pispbe_runtime_resume() as __maybe_unused - Add fixes tags where appropriate v1->v2: - Add two patches to address Laurent's comments separately - use scoped_guard() when possible - Add patch to fix runtime_pm imbalance --- Jacopo Mondi (4): media: pisp_be: Drop reference to non-existing function media: pisp_be: Remove config validation from schedule() media: pisp_be: Split jobs creation and scheduling media: pisp_be: Fix pm_runtime underrun in probe drivers/media/platform/raspberrypi/pisp_be/Kconfig | 1 + .../media/platform/raspberrypi/pisp_be/pisp_be.c | 196 ++++++++++----------- 2 files changed, 98 insertions(+), 99 deletions(-) --- base-commit: ce5cac69b2edac3e3246fee03e8f4c2a1075238b change-id: 20240930-pispbe-mainline-split-jobs-handling-v6-15dc16e11e3a Best regards, -- Jacopo Mondi <jacopo.mondi(a)ideasonboard.com>

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FAILED: patch "[PATCH] usb: cdnsp: Fix issue with detecting command completion event" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x f4ecdc352646f7d23f348e5c544dbe3212c94fc8 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025061707-putt-mutable-5fb5@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From f4ecdc352646f7d23f348e5c544dbe3212c94fc8 Mon Sep 17 00:00:00 2001 From: Pawel Laszczak <pawell(a)cadence.com> Date: Tue, 13 May 2025 05:30:09 +0000 Subject: [PATCH] usb: cdnsp: Fix issue with detecting command completion event In some cases, there is a small-time gap in which CMD_RING_BUSY can be cleared by controller but adding command completion event to event ring will be delayed. As the result driver will return error code. This behavior has been detected on usbtest driver (test 9) with configuration including ep1in/ep1out bulk and ep2in/ep2out isoc endpoint. Probably this gap occurred because controller was busy with adding some other events to event ring. The CMD_RING_BUSY is cleared to '0' when the Command Descriptor has been executed and not when command completion event has been added to event ring. To fix this issue for this test the small delay is sufficient less than 10us) but to make sure the problem doesn't happen again in the future the patch introduces 10 retries to check with delay about 20us before returning error code. Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver") Cc: stable <stable(a)kernel.org> Signed-off-by: Pawel Laszczak <pawell(a)cadence.com> Acked-by: Peter Chen <peter.chen(a)kernel.org> Link: https://lore.kernel.org/r/PH7PR07MB9538AA45362ACCF1B94EE9B7DD96A@PH7PR07MB9… Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> diff --git a/drivers/usb/cdns3/cdnsp-gadget.c b/drivers/usb/cdns3/cdnsp-gadget.c index cd1e00daf43f..55f95f41b3b4 100644 --- a/drivers/usb/cdns3/cdnsp-gadget.c +++ b/drivers/usb/cdns3/cdnsp-gadget.c @@ -548,6 +548,7 @@ int cdnsp_wait_for_cmd_compl(struct cdnsp_device *pdev) dma_addr_t cmd_deq_dma; union cdnsp_trb *event; u32 cycle_state; + u32 retry = 10; int ret, val; u64 cmd_dma; u32 flags; @@ -579,8 +580,23 @@ int cdnsp_wait_for_cmd_compl(struct cdnsp_device *pdev) flags = le32_to_cpu(event->event_cmd.flags); /* Check the owner of the TRB. */ - if ((flags & TRB_CYCLE) != cycle_state) + if ((flags & TRB_CYCLE) != cycle_state) { + /* + * Give some extra time to get chance controller + * to finish command before returning error code. + * Checking CMD_RING_BUSY is not sufficient because + * this bit is cleared to '0' when the Command + * Descriptor has been executed by controller + * and not when command completion event has + * be added to event ring. + */ + if (retry--) { + udelay(20); + continue; + } + return -EINVAL; + } cmd_dma = le64_to_cpu(event->event_cmd.cmd_trb);

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