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+ iov_iter-iterate_folioq-fix-handling-of-offset-=-folio-size.patch added to mm-hotfixes-unstable branch

by Andrew Morton

The patch titled Subject: iov_iter: iterate_folioq: fix handling of offset >= folio size has been added to the -mm mm-hotfixes-unstable branch. Its filename is iov_iter-iterate_folioq-fix-handling-of-offset-=-folio-size.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Dominique Martinet <asmadeus(a)codewreck.org> Subject: iov_iter: iterate_folioq: fix handling of offset >= folio size Date: Mon, 11 Aug 2025 16:39:05 +0900 So we've had this regression in 9p for.. almost a year, which is way too long, but there was no "easy" reproducer until yesterday (thank you again!!) It turned out to be a bug with iov_iter on folios, iov_iter_get_pages_alloc2() would advance the iov_iter correctly up to the end edge of a folio and the later copy_to_iter() fails on the iterate_folioq() bug. Happy to consider alternative ways of fixing this, now there's a reproducer it's all much clearer; for the bug to be visible we basically need to make and IO with non-contiguous folios in the iov_iter which is not obvious to test with synthetic VMs, with size that triggers a zero-copy read followed by a non-zero-copy read. It's apparently possible to get an iov forwarded all the way up to the end of the current page we're looking at, e.g. (gdb) p *iter $24 = {iter_type = 4 '\004', nofault = false, data_source = false, iov_offset = 4096, {__ubuf_iovec = { iov_base = 0xffff88800f5bc000, iov_len = 655}, {{__iov = 0xffff88800f5bc000, kvec = 0xffff88800f5bc000, bvec = 0xffff88800f5bc000, folioq = 0xffff88800f5bc000, xarray = 0xffff88800f5bc000, ubuf = 0xffff88800f5bc000}, count = 655}}, {nr_segs = 2, folioq_slot = 2 '\002', xarray_start = 2}} Where iov_offset is 4k with 4k-sized folios This should have been because we're only in the 2nd slot and there's another one after this, but iterate_folioq should not try to map a folio that skips the whole size, and more importantly part here does not end up zero (because 'PAGE_SIZE - skip % PAGE_SIZE' ends up PAGE_SIZE and not zero..), so skip forward to the "advance to next folio" code. Link: https://lkml.kernel.org/r/20250811-iot_iter_folio-v1-0-d9c223adf93c@codewre… Link: https://lkml.kernel.org/r/20250811-iot_iter_folio-v1-1-d9c223adf93c@codewre… Link: https://lkml.kernel.org/r/D4LHHUNLG79Y.12PI0X6BEHRHW@mbosch.me/ Fixes: db0aa2e9566f ("mm: Define struct folio_queue and ITER_FOLIOQ to handle a sequence of folios") Signed-off-by: Dominique Martinet <asmadeus(a)codewreck.org> Reported-by: Maximilian Bosch <maximilian(a)mbosch.me> Reported-by: Ryan Lahfa <ryan(a)lahfa.xyz> Reported-by: Christian Theune <ct(a)flyingcircus.io> Reported-by: Arnout Engelen <arnout(a)bzzt.net> Cc: Al Viro <viro(a)zeniv.linux.org.uk> Cc: Christian Brauner <brauner(a)kernel.org> Cc: David Howells <dhowells(a)redhat.com> Cc: Ryan Lahfa <ryan(a)lahfa.xyz> Cc: <stable(a)vger.kernel.org> [v6.12+] Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- include/linux/iov_iter.h | 3 +++ 1 file changed, 3 insertions(+) --- a/include/linux/iov_iter.h~iov_iter-iterate_folioq-fix-handling-of-offset-=-folio-size +++ a/include/linux/iov_iter.h @@ -168,6 +168,8 @@ size_t iterate_folioq(struct iov_iter *i break; fsize = folioq_folio_size(folioq, slot); + if (skip >= fsize) + goto next; base = kmap_local_folio(folio, skip); part = umin(len, PAGE_SIZE - skip % PAGE_SIZE); remain = step(base, progress, part, priv, priv2); @@ -177,6 +179,7 @@ size_t iterate_folioq(struct iov_iter *i progress += consumed; skip += consumed; if (skip >= fsize) { +next: skip = 0; slot++; if (slot == folioq_nr_slots(folioq) && folioq->next) { _ Patches currently in -mm which might be from asmadeus(a)codewreck.org are iov_iter-iterate_folioq-fix-handling-of-offset-=-folio-size.patch iov_iter-iov_folioq_get_pages-dont-leave-empty-slot-behind.patch

3 months, 3 weeks

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FAILED: patch "[PATCH] HID: apple: avoid setting up battery timer for devices" 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 c061046fe9ce3ff31fb9a807144a2630ad349c17 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081201-cupid-custodian-14e8@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From c061046fe9ce3ff31fb9a807144a2630ad349c17 Mon Sep 17 00:00:00 2001 From: Aditya Garg <gargaditya08(a)live.com> Date: Mon, 30 Jun 2025 12:37:13 +0000 Subject: [PATCH] HID: apple: avoid setting up battery timer for devices without battery Currently, the battery timer is set up for all devices using hid-apple, irrespective of whether they actually have a battery or not. APPLE_RDESC_BATTERY is a quirk that indicates the device has a battery and needs the battery timer. This patch checks for this quirk before setting up the timer, ensuring that only devices with a battery will have the timer set up. Fixes: 6e143293e17a ("HID: apple: Report Magic Keyboard battery over USB") Cc: stable(a)vger.kernel.org Signed-off-by: Aditya Garg <gargaditya08(a)live.com> Signed-off-by: Jiri Kosina <jkosina(a)suse.com> diff --git a/drivers/hid/hid-apple.c b/drivers/hid/hid-apple.c index 0639b1f43d88..8ab15a8f3524 100644 --- a/drivers/hid/hid-apple.c +++ b/drivers/hid/hid-apple.c @@ -933,10 +933,12 @@ static int apple_probe(struct hid_device *hdev, return ret; } - timer_setup(&asc->battery_timer, apple_battery_timer_tick, 0); - mod_timer(&asc->battery_timer, - jiffies + msecs_to_jiffies(APPLE_BATTERY_TIMEOUT_MS)); - apple_fetch_battery(hdev); + if (quirks & APPLE_RDESC_BATTERY) { + timer_setup(&asc->battery_timer, apple_battery_timer_tick, 0); + mod_timer(&asc->battery_timer, + jiffies + msecs_to_jiffies(APPLE_BATTERY_TIMEOUT_MS)); + apple_fetch_battery(hdev); + } if (quirks & APPLE_BACKLIGHT_CTL) apple_backlight_init(hdev); @@ -950,7 +952,9 @@ static int apple_probe(struct hid_device *hdev, return 0; out_err: - timer_delete_sync(&asc->battery_timer); + if (quirks & APPLE_RDESC_BATTERY) + timer_delete_sync(&asc->battery_timer); + hid_hw_stop(hdev); return ret; } @@ -959,7 +963,8 @@ static void apple_remove(struct hid_device *hdev) { struct apple_sc *asc = hid_get_drvdata(hdev); - timer_delete_sync(&asc->battery_timer); + if (asc->quirks & APPLE_RDESC_BATTERY) + timer_delete_sync(&asc->battery_timer); hid_hw_stop(hdev); }

3 months, 3 weeks

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FAILED: patch "[PATCH] HID: apple: avoid setting up battery timer for devices" 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 c061046fe9ce3ff31fb9a807144a2630ad349c17 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081201-undamaged-referee-deb6@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From c061046fe9ce3ff31fb9a807144a2630ad349c17 Mon Sep 17 00:00:00 2001 From: Aditya Garg <gargaditya08(a)live.com> Date: Mon, 30 Jun 2025 12:37:13 +0000 Subject: [PATCH] HID: apple: avoid setting up battery timer for devices without battery Currently, the battery timer is set up for all devices using hid-apple, irrespective of whether they actually have a battery or not. APPLE_RDESC_BATTERY is a quirk that indicates the device has a battery and needs the battery timer. This patch checks for this quirk before setting up the timer, ensuring that only devices with a battery will have the timer set up. Fixes: 6e143293e17a ("HID: apple: Report Magic Keyboard battery over USB") Cc: stable(a)vger.kernel.org Signed-off-by: Aditya Garg <gargaditya08(a)live.com> Signed-off-by: Jiri Kosina <jkosina(a)suse.com> diff --git a/drivers/hid/hid-apple.c b/drivers/hid/hid-apple.c index 0639b1f43d88..8ab15a8f3524 100644 --- a/drivers/hid/hid-apple.c +++ b/drivers/hid/hid-apple.c @@ -933,10 +933,12 @@ static int apple_probe(struct hid_device *hdev, return ret; } - timer_setup(&asc->battery_timer, apple_battery_timer_tick, 0); - mod_timer(&asc->battery_timer, - jiffies + msecs_to_jiffies(APPLE_BATTERY_TIMEOUT_MS)); - apple_fetch_battery(hdev); + if (quirks & APPLE_RDESC_BATTERY) { + timer_setup(&asc->battery_timer, apple_battery_timer_tick, 0); + mod_timer(&asc->battery_timer, + jiffies + msecs_to_jiffies(APPLE_BATTERY_TIMEOUT_MS)); + apple_fetch_battery(hdev); + } if (quirks & APPLE_BACKLIGHT_CTL) apple_backlight_init(hdev); @@ -950,7 +952,9 @@ static int apple_probe(struct hid_device *hdev, return 0; out_err: - timer_delete_sync(&asc->battery_timer); + if (quirks & APPLE_RDESC_BATTERY) + timer_delete_sync(&asc->battery_timer); + hid_hw_stop(hdev); return ret; } @@ -959,7 +963,8 @@ static void apple_remove(struct hid_device *hdev) { struct apple_sc *asc = hid_get_drvdata(hdev); - timer_delete_sync(&asc->battery_timer); + if (asc->quirks & APPLE_RDESC_BATTERY) + timer_delete_sync(&asc->battery_timer); hid_hw_stop(hdev); }

3 months, 3 weeks

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FAILED: patch "[PATCH] HID: apple: avoid setting up battery timer for devices" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-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-6.1.y git checkout FETCH_HEAD git cherry-pick -x c061046fe9ce3ff31fb9a807144a2630ad349c17 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025081202-delirium-stubborn-aa45@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From c061046fe9ce3ff31fb9a807144a2630ad349c17 Mon Sep 17 00:00:00 2001 From: Aditya Garg <gargaditya08(a)live.com> Date: Mon, 30 Jun 2025 12:37:13 +0000 Subject: [PATCH] HID: apple: avoid setting up battery timer for devices without battery Currently, the battery timer is set up for all devices using hid-apple, irrespective of whether they actually have a battery or not. APPLE_RDESC_BATTERY is a quirk that indicates the device has a battery and needs the battery timer. This patch checks for this quirk before setting up the timer, ensuring that only devices with a battery will have the timer set up. Fixes: 6e143293e17a ("HID: apple: Report Magic Keyboard battery over USB") Cc: stable(a)vger.kernel.org Signed-off-by: Aditya Garg <gargaditya08(a)live.com> Signed-off-by: Jiri Kosina <jkosina(a)suse.com> diff --git a/drivers/hid/hid-apple.c b/drivers/hid/hid-apple.c index 0639b1f43d88..8ab15a8f3524 100644 --- a/drivers/hid/hid-apple.c +++ b/drivers/hid/hid-apple.c @@ -933,10 +933,12 @@ static int apple_probe(struct hid_device *hdev, return ret; } - timer_setup(&asc->battery_timer, apple_battery_timer_tick, 0); - mod_timer(&asc->battery_timer, - jiffies + msecs_to_jiffies(APPLE_BATTERY_TIMEOUT_MS)); - apple_fetch_battery(hdev); + if (quirks & APPLE_RDESC_BATTERY) { + timer_setup(&asc->battery_timer, apple_battery_timer_tick, 0); + mod_timer(&asc->battery_timer, + jiffies + msecs_to_jiffies(APPLE_BATTERY_TIMEOUT_MS)); + apple_fetch_battery(hdev); + } if (quirks & APPLE_BACKLIGHT_CTL) apple_backlight_init(hdev); @@ -950,7 +952,9 @@ static int apple_probe(struct hid_device *hdev, return 0; out_err: - timer_delete_sync(&asc->battery_timer); + if (quirks & APPLE_RDESC_BATTERY) + timer_delete_sync(&asc->battery_timer); + hid_hw_stop(hdev); return ret; } @@ -959,7 +963,8 @@ static void apple_remove(struct hid_device *hdev) { struct apple_sc *asc = hid_get_drvdata(hdev); - timer_delete_sync(&asc->battery_timer); + if (asc->quirks & APPLE_RDESC_BATTERY) + timer_delete_sync(&asc->battery_timer); hid_hw_stop(hdev); }

3 months, 3 weeks

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[PATCH v1] ufs: host: mediatek: Fix out-of-bounds access in MCQ IRQ mapping

by peter.wang＠mediatek.com

From: Peter Wang <peter.wang(a)mediatek.com> This patch addresses a potential out-of-bounds access issue when accessing 'host->mcq_intr_info[q_index]'. The value of 'q_index' might exceed the valid array bounds if 'q_index == nr'. The condition is corrected to 'q_index >= nr' to prevent accessing invalid memory. Fixes: 66e26a4b8a77 ("scsi: ufs: host: mediatek: Set IRQ affinity policy for MCQ mode") Cc: <stable(a)vger.kernel.org> Reported-by: Dan Carpenter <dan.carpenter(a)linaro.org> Signed-off-by: Peter Wang <peter.wang(a)mediatek.com> --- drivers/ufs/host/ufs-mediatek.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c index 86ae73b89d4d..f902ce08c95a 100644 --- a/drivers/ufs/host/ufs-mediatek.c +++ b/drivers/ufs/host/ufs-mediatek.c @@ -818,7 +818,7 @@ static u32 ufs_mtk_mcq_get_irq(struct ufs_hba *hba, unsigned int cpu) unsigned int q_index; q_index = map->mq_map[cpu]; - if (q_index > nr) { + if (q_index >= nr) { dev_err(hba->dev, "hwq index %d exceed %d\n", q_index, nr); return MTK_MCQ_INVALID_IRQ; -- 2.45.2

3 months, 3 weeks

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We are interested in purchasing your products

by PERDIS SUPER U

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3 months, 3 weeks

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Re: [PATCH] ACPI: EC: Relax sanity check of the ECDT ID string

by Ilya K

On 2025-08-12 16:32, Rafael J. Wysocki wrote: > > Applied as 6.17-rc material and sorry for the delay (I was offline). > > Thanks! Thanks! Tagging stable@ so we're hopefully in time for 6.16.1.

3 months, 3 weeks

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[PATCH 5.4 0/6] Fix build due to clang -Qunused-arguments change

by Nathan Chancellor

This is an updated version of [1], just for 5.4, which was waiting on commit 87c4e1459e80 ("ARM: 9448/1: Use an absolute path to unified.h in KBUILD_AFLAGS") to avoid regressing the build [2]. These changes are needed there due to an upstream LLVM change [3] that changes the behavior of -Qunused-arguments with unknown target options, which is only used in 6.1 and older since I removed it in commit 8d9acfce3332 ("kbuild: Stop using '-Qunused-arguments' with clang") in 6.3. Please let me know if there are any issues. [1]: https://lore.kernel.org/20250604233141.GA2374479@ax162/ [2]: https://lore.kernel.org/CACo-S-1qbCX4WAVFA63dWfHtrRHZBTyyr2js8Lx=Az03XHTTHg… [3]: https://github.com/llvm/llvm-project/commit/a4b2f4a72aa9b4655ecc723838830e0… Masahiro Yamada (1): kbuild: add $(CLANG_FLAGS) to KBUILD_CPPFLAGS Nathan Chancellor (4): ARM: 9448/1: Use an absolute path to unified.h in KBUILD_AFLAGS mips: Include KBUILD_CPPFLAGS in CHECKFLAGS invocation kbuild: Add CLANG_FLAGS to as-instr kbuild: Add KBUILD_CPPFLAGS to as-option invocation Nick Desaulniers (1): kbuild: Update assembler calls to use proper flags and language target Makefile | 3 +-- arch/arm/Makefile | 2 +- arch/mips/Makefile | 2 +- scripts/Kbuild.include | 8 ++++---- 4 files changed, 7 insertions(+), 8 deletions(-) base-commit: 04b7726c3cdd2fb4da040c2b898bcf405ed607bd -- 2.50.1

3 months, 3 weeks

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[REGRESSION] stable-rc/linux-5.15.y: (build) implicit declaration of function 'guest_cpu_cap_has' [-Werror,-Wim...

by KernelCI bot

Hello, New build issue found on stable-rc/linux-5.15.y: --- implicit declaration of function 'guest_cpu_cap_has' [-Werror,-Wimplicit-function-declaration] in arch/x86/kvm/vmx/vmx.o (arch/x86/kvm/vmx/vmx.c) [logspec:kbuild,kbuild.compiler.error] --- - dashboard: https://d.kernelci.org/i/maestro:ffd38b22f4d3da011e2d8142fcd9b848083d18fb - giturl: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git - commit HEAD: 62f5d931273c281f86db2d54bfa496b2a2b400cc Log excerpt: ===================================================== arch/x86/kvm/vmx/vmx.c:2022:25: error: implicit declaration of function 'guest_cpu_cap_has' [-Werror,-Wimplicit-function-declaration] 2022 | (host_initiated || guest_cpu_cap_has(vcpu, X86_FEATURE_RTM))) | ^ arch/x86/kvm/vmx/vmx.c:2022:25: note: did you mean 'guest_cpuid_has'? ./arch/x86/kvm/cpuid.h:84:29: note: 'guest_cpuid_has' declared here 84 | static __always_inline bool guest_cpuid_has(struct kvm_vcpu *vcpu, | ^ arch/x86/kvm/vmx/vmx.c:2022:7: error: use of undeclared identifier 'host_initiated' 2022 | (host_initiated || guest_cpu_cap_has(vcpu, X86_FEATURE_RTM))) | ^ 2 errors generated. ===================================================== # Builds where the incident occurred: ## i386_defconfig+allmodconfig+CONFIG_FRAME_WARN=2048 on (i386): - compiler: clang-17 - dashboard: https://d.kernelci.org/build/maestro:689b7884233e484a3f8f254e #kernelci issue maestro:ffd38b22f4d3da011e2d8142fcd9b848083d18fb Reported-by: kernelci.org bot <bot(a)kernelci.org> -- This is an experimental report format. Please send feedback in! Talk to us at kernelci(a)lists.linux.dev Made with love by the KernelCI team - https://kernelci.org

3 months, 3 weeks

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[PATCH net v2] net: usbnet: Fix the wrong netif_carrier_on() call placement

by Ammar Faizi

The commit in the Fixes tag breaks my laptop (found by git bisect). My home RJ45 LAN cable cannot connect after that commit. The call to netif_carrier_on() should be done when netif_carrier_ok() is false. Not when it's true. Because calling netif_carrier_on() when __LINK_STATE_NOCARRIER is not set actually does nothing. Cc: Armando Budianto <sprite(a)gnuweeb.org> Cc: stable(a)vger.kernel.org Closes: https://lore.kernel.org/netdev/0752dee6-43d6-4e1f-81d2-4248142cccd2@gnuweeb… Fixes: 0d9cfc9b8cb1 ("net: usbnet: Avoid potential RCU stall on LINK_CHANGE event") Signed-off-by: Ammar Faizi <ammarfaizi2(a)gnuweeb.org> --- v2: - Rebase on top of the latest netdev/net tree. The previous patch was based on 0d9cfc9b8cb1. Line numbers have changed since then. drivers/net/usb/usbnet.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index a38ffbf4b3f0..a1827684b92c 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1114,31 +1114,31 @@ static const struct ethtool_ops usbnet_ethtool_ops = { }; /*-------------------------------------------------------------------------*/ static void __handle_link_change(struct usbnet *dev) { if (!test_bit(EVENT_DEV_OPEN, &dev->flags)) return; if (!netif_carrier_ok(dev->net)) { + if (test_and_clear_bit(EVENT_LINK_CARRIER_ON, &dev->flags)) + netif_carrier_on(dev->net); + /* kill URBs for reading packets to save bus bandwidth */ unlink_urbs(dev, &dev->rxq); /* * tx_timeout will unlink URBs for sending packets and * tx queue is stopped by netcore after link becomes off */ } else { - if (test_and_clear_bit(EVENT_LINK_CARRIER_ON, &dev->flags)) - netif_carrier_on(dev->net); - /* submitting URBs for reading packets */ queue_work(system_bh_wq, &dev->bh_work); } /* hard_mtu or rx_urb_size may change during link change */ usbnet_update_max_qlen(dev); clear_bit(EVENT_LINK_CHANGE, &dev->flags); } -- Ammar Faizi

3 months, 3 weeks

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