- Linux-stable-mirror - lists.linaro.org

FAILED: patch "[PATCH] kbuild: add $(CLANG_FLAGS) to KBUILD_CPPFLAGS" 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 feb843a469fb0ab00d2d23cfb9bcc379791011bb # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025062527-parkway-hardening-abe3@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From feb843a469fb0ab00d2d23cfb9bcc379791011bb Mon Sep 17 00:00:00 2001 From: Masahiro Yamada <masahiroy(a)kernel.org> Date: Sun, 9 Apr 2023 23:53:57 +0900 Subject: [PATCH] kbuild: add $(CLANG_FLAGS) to KBUILD_CPPFLAGS When preprocessing arch/*/kernel/vmlinux.lds.S, the target triple is not passed to $(CPP) because we add it only to KBUILD_{C,A}FLAGS. As a result, the linker script is preprocessed with predefined macros for the build host instead of the target. Assuming you use an x86 build machine, compare the following: $ clang -dM -E -x c /dev/null $ clang -dM -E -x c /dev/null -target aarch64-linux-gnu There is no actual problem presumably because our linker scripts do not rely on such predefined macros, but it is better to define correct ones. Move $(CLANG_FLAGS) to KBUILD_CPPFLAGS, so that all *.c, *.S, *.lds.S will be processed with the proper target triple. [Note] After the patch submission, we got an actual problem that needs this commit. (CBL issue 1859) Link: https://github.com/ClangBuiltLinux/linux/issues/1859 Reported-by: Tom Rini <trini(a)konsulko.com> Signed-off-by: Masahiro Yamada <masahiroy(a)kernel.org> Reviewed-by: Nathan Chancellor <nathan(a)kernel.org> Tested-by: Nathan Chancellor <nathan(a)kernel.org> diff --git a/scripts/Makefile.clang b/scripts/Makefile.clang index 9076cc939e87..058a4c0f864e 100644 --- a/scripts/Makefile.clang +++ b/scripts/Makefile.clang @@ -34,6 +34,5 @@ CLANG_FLAGS += -Werror=unknown-warning-option CLANG_FLAGS += -Werror=ignored-optimization-argument CLANG_FLAGS += -Werror=option-ignored CLANG_FLAGS += -Werror=unused-command-line-argument -KBUILD_CFLAGS += $(CLANG_FLAGS) -KBUILD_AFLAGS += $(CLANG_FLAGS) +KBUILD_CPPFLAGS += $(CLANG_FLAGS) export CLANG_FLAGS

2 weeks, 4 days

1
0
0 0

FAILED: patch "[PATCH] mips: Include KBUILD_CPPFLAGS in CHECKFLAGS invocation" 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 08f6554ff90ef189e6b8f0303e57005bddfdd6a7 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025062558-erupt-quack-32ad@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 08f6554ff90ef189e6b8f0303e57005bddfdd6a7 Mon Sep 17 00:00:00 2001 From: Nathan Chancellor <nathan(a)kernel.org> Date: Thu, 1 Jun 2023 11:38:24 -0700 Subject: [PATCH] mips: Include KBUILD_CPPFLAGS in CHECKFLAGS invocation A future change will move CLANG_FLAGS from KBUILD_{A,C}FLAGS to KBUILD_CPPFLAGS so that '--target' is available while preprocessing. When that occurs, the following error appears when building ARCH=mips with clang (tip of tree error shown): clang: error: unsupported option '-mabi=' for target 'x86_64-pc-linux-gnu' Add KBUILD_CPPFLAGS in the CHECKFLAGS invocation to keep everything working after the move. Signed-off-by: Nathan Chancellor <nathan(a)kernel.org> Signed-off-by: Masahiro Yamada <masahiroy(a)kernel.org> diff --git a/arch/mips/Makefile b/arch/mips/Makefile index a7a4ee66a9d3..ef7b05ae92ce 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -346,7 +346,7 @@ KBUILD_CFLAGS += -fno-asynchronous-unwind-tables KBUILD_LDFLAGS += -m $(ld-emul) ifdef CONFIG_MIPS -CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ +CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \ grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \ sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g') endif

2 weeks, 4 days

1
0
0 0

FAILED: patch "[PATCH] kbuild: Add CLANG_FLAGS to as-instr" 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 cff6e7f50bd315e5b39c4e46c704ac587ceb965f # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025062527-wobble-barn-4424@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From cff6e7f50bd315e5b39c4e46c704ac587ceb965f Mon Sep 17 00:00:00 2001 From: Nathan Chancellor <nathan(a)kernel.org> Date: Thu, 1 Jun 2023 12:50:39 -0700 Subject: [PATCH] kbuild: Add CLANG_FLAGS to as-instr A future change will move CLANG_FLAGS from KBUILD_{A,C}FLAGS to KBUILD_CPPFLAGS so that '--target' is available while preprocessing. When that occurs, the following errors appear multiple times when building ARCH=powerpc powernv_defconfig: ld.lld: error: vmlinux.a(arch/powerpc/kernel/head_64.o):(.text+0x12d4): relocation R_PPC64_ADDR16_HI out of range: -4611686018409717520 is not in [-2147483648, 2147483647]; references '__start___soft_mask_table' ld.lld: error: vmlinux.a(arch/powerpc/kernel/head_64.o):(.text+0x12e8): relocation R_PPC64_ADDR16_HI out of range: -4611686018409717392 is not in [-2147483648, 2147483647]; references '__stop___soft_mask_table' Diffing the .o.cmd files reveals that -DHAVE_AS_ATHIGH=1 is not present anymore, because as-instr only uses KBUILD_AFLAGS, which will no longer contain '--target'. Mirror Kconfig's as-instr and add CLANG_FLAGS explicitly to the invocation to ensure the target information is always present. Signed-off-by: Nathan Chancellor <nathan(a)kernel.org> Signed-off-by: Masahiro Yamada <masahiroy(a)kernel.org> diff --git a/scripts/Makefile.compiler b/scripts/Makefile.compiler index 7aa1fbc4aafe..437013f8def3 100644 --- a/scripts/Makefile.compiler +++ b/scripts/Makefile.compiler @@ -38,7 +38,7 @@ as-option = $(call try-run,\ # Usage: aflags-y += $(call as-instr,instr,option1,option2) as-instr = $(call try-run,\ - printf "%b\n" "$(1)" | $(CC) -Werror $(KBUILD_AFLAGS) -c -x assembler-with-cpp -o "$$TMP" -,$(2),$(3)) + printf "%b\n" "$(1)" | $(CC) -Werror $(CLANG_FLAGS) $(KBUILD_AFLAGS) -c -x assembler-with-cpp -o "$$TMP" -,$(2),$(3)) # __cc-option # Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586)

2 weeks, 4 days

1
0
0 0

FAILED: patch "[PATCH] kbuild: Update assembler calls to use proper flags and" 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 d5c8d6e0fa61401a729e9eb6a9c7077b2d3aebb0 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2025062507-surgical-strive-b54b@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From d5c8d6e0fa61401a729e9eb6a9c7077b2d3aebb0 Mon Sep 17 00:00:00 2001 From: Nick Desaulniers <ndesaulniers(a)google.com> Date: Wed, 11 Jan 2023 20:05:01 -0700 Subject: [PATCH] kbuild: Update assembler calls to use proper flags and language target as-instr uses KBUILD_AFLAGS, but as-option uses KBUILD_CFLAGS. This can cause as-option to fail unexpectedly when CONFIG_WERROR is set, because clang will emit -Werror,-Wunused-command-line-argument for various -m and -f flags in KBUILD_CFLAGS for assembler sources. Callers of as-option and as-instr should be adding flags to KBUILD_AFLAGS / aflags-y, not KBUILD_CFLAGS / cflags-y. Use KBUILD_AFLAGS in all macros to clear up the initial problem. Unfortunately, -Wunused-command-line-argument can still be triggered with clang by the presence of warning flags or macro definitions because '-x assembler' is used, instead of '-x assembler-with-cpp', which will consume these flags. Switch to '-x assembler-with-cpp' in places where '-x assembler' is used, as the compiler is always used as the driver for out of line assembler sources in the kernel. Finally, add -Werror to these macros so that they behave consistently whether or not CONFIG_WERROR is set. [nathan: Reworded and expanded on problems in commit message Use '-x assembler-with-cpp' in a couple more places] Link: https://github.com/ClangBuiltLinux/linux/issues/1699 Suggested-by: Masahiro Yamada <masahiroy(a)kernel.org> Signed-off-by: Nick Desaulniers <ndesaulniers(a)google.com> Signed-off-by: Nathan Chancellor <nathan(a)kernel.org> Tested-by: Linux Kernel Functional Testing <lkft(a)linaro.org> Tested-by: Anders Roxell <anders.roxell(a)linaro.org> Signed-off-by: Masahiro Yamada <masahiroy(a)kernel.org> diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include index 274125307ebd..5a84b6443875 100644 --- a/scripts/Kconfig.include +++ b/scripts/Kconfig.include @@ -33,7 +33,7 @@ ld-option = $(success,$(LD) -v $(1)) # $(as-instr,<instr>) # Return y if the assembler supports <instr>, n otherwise -as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -c -x assembler -o /dev/null -) +as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -c -x assembler-with-cpp -o /dev/null -) # check if $(CC) and $(LD) exist $(error-if,$(failure,command -v $(CC)),C compiler '$(CC)' not found) diff --git a/scripts/Makefile.compiler b/scripts/Makefile.compiler index 3d8adfd34af1..7aa1fbc4aafe 100644 --- a/scripts/Makefile.compiler +++ b/scripts/Makefile.compiler @@ -29,16 +29,16 @@ try-run = $(shell set -e; \ fi) # as-option -# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,) +# Usage: aflags-y += $(call as-option,-Wa$(comma)-isa=foo,) as-option = $(call try-run,\ - $(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o "$$TMP",$(1),$(2)) + $(CC) -Werror $(KBUILD_AFLAGS) $(1) -c -x assembler-with-cpp /dev/null -o "$$TMP",$(1),$(2)) # as-instr -# Usage: cflags-y += $(call as-instr,instr,option1,option2) +# Usage: aflags-y += $(call as-instr,instr,option1,option2) as-instr = $(call try-run,\ - printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3)) + printf "%b\n" "$(1)" | $(CC) -Werror $(KBUILD_AFLAGS) -c -x assembler-with-cpp -o "$$TMP" -,$(2),$(3)) # __cc-option # Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586) diff --git a/scripts/as-version.sh b/scripts/as-version.sh index 1a21495e9ff0..af717476152d 100755 --- a/scripts/as-version.sh +++ b/scripts/as-version.sh @@ -45,7 +45,7 @@ orig_args="$@" # Get the first line of the --version output. IFS=' ' -set -- $(LC_ALL=C "$@" -Wa,--version -c -x assembler /dev/null -o /dev/null 2>/dev/null) +set -- $(LC_ALL=C "$@" -Wa,--version -c -x assembler-with-cpp /dev/null -o /dev/null 2>/dev/null) # Split the line on spaces. IFS=' '

2 weeks, 4 days

1
0
0 0

[PATCH 1/2] maple_tree: Fix mt_destroy_walk() on root leaf node

by Liam R. Howlett

From: Wei Yang <richard.weiyang(a)gmail.com> On destroy, we should set each node dead. But current code miss this when the maple tree has only the root node. The reason is mt_destroy_walk() leverage mte_destroy_descend() to set node dead, but this is skipped since the only root node is a leaf. Fixes this by setting the node dead if it is a leaf. Link: https://lore.kernel.org/all/20250407231354.11771-1-richard.weiyang@gmail.co… Fixes: 54a611b60590 ("Maple Tree: add new data structure") Signed-off-by: Wei Yang <richard.weiyang(a)gmail.com> CC: Liam R. Howlett <Liam.Howlett(a)Oracle.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Liam R. Howlett <Liam.Howlett(a)oracle.com> --- lib/maple_tree.c | 1 + 1 file changed, 1 insertion(+) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index 6b0fc6ebbe363..85d17d943753d 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -5319,6 +5319,7 @@ static void mt_destroy_walk(struct maple_enode *enode, struct maple_tree *mt, struct maple_enode *start; if (mte_is_leaf(enode)) { + mte_set_node_dead(enode); node->type = mte_node_type(enode); goto free_leaf; } -- 2.47.2

2 weeks, 4 days

2
1
0 0

[PATCH 1/1] iommu/vt-d: Enable ATS before cache tag assignment

by Lu Baolu

Commit <4f1492efb495> ("iommu/vt-d: Revert ATS timing change to fix boot failure") placed the enabling of ATS in the probe_finalize callback. This occurs after the default domain attachment, which is when the ATS cache tag is assigned. Consequently, the device TLB cache tag is missed when the domain is attached, leading to the device TLB not being invalidated in the iommu_unmap paths. Fix it by moving the ATS enabling to the default domain attachment path, ensuring ATS is enabled before the cache tag assignment. Fixes: 4f1492efb495 ("iommu/vt-d: Revert ATS timing change to fix boot failure") Cc: stable(a)vger.kernel.org Signed-off-by: Lu Baolu <baolu.lu(a)linux.intel.com> --- drivers/iommu/intel/iommu.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 7aa3932251b2..863ccb47bcca 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -54,6 +54,7 @@ __DOMAIN_MAX_PFN(gaw), (unsigned long)-1)) #define DOMAIN_MAX_ADDR(gaw) (((uint64_t)__DOMAIN_MAX_PFN(gaw)) << VTD_PAGE_SHIFT) +static void sm_iommu_enable_pcicaps(struct device *dev); static void __init check_tylersburg_isoch(void); static int rwbf_quirk; @@ -1825,10 +1826,11 @@ static int dmar_domain_attach_device(struct dmar_domain *domain, else ret = domain_setup_second_level(iommu, domain, dev, IOMMU_NO_PASID, NULL); - if (ret) goto out_block_translation; + /* PCI ATS enablement must happen before cache tag assigning. */ + sm_iommu_enable_pcicaps(dev); ret = cache_tag_assign_domain(domain, dev, IOMMU_NO_PASID); if (ret) goto out_block_translation; @@ -3765,11 +3767,18 @@ static struct iommu_device *intel_iommu_probe_device(struct device *dev) return ERR_PTR(ret); } -static void intel_iommu_probe_finalize(struct device *dev) +static void sm_iommu_enable_pcicaps(struct device *dev) { struct device_domain_info *info = dev_iommu_priv_get(dev); struct intel_iommu *iommu = info->iommu; + /* + * Called only in iommu_device_register() path when iommu is + * configured in the scalable mode. + */ + if (!sm_supported(iommu) || READ_ONCE(iommu->iommu.ready)) + return; + /* * The PCIe spec, in its wisdom, declares that the behaviour of the * device is undefined if you enable PASID support after ATS support. @@ -3780,7 +3789,7 @@ static void intel_iommu_probe_finalize(struct device *dev) !pci_enable_pasid(to_pci_dev(dev), info->pasid_supported & ~1)) info->pasid_enabled = 1; - if (sm_supported(iommu) && !dev_is_real_dma_subdevice(dev)) + if (!dev_is_real_dma_subdevice(dev)) iommu_enable_pci_ats(info); iommu_enable_pci_pri(info); } @@ -4309,6 +4318,7 @@ static int identity_domain_attach_dev(struct iommu_domain *domain, struct device ret = intel_pasid_setup_pass_through(iommu, dev, IOMMU_NO_PASID); else ret = device_setup_pass_through(dev); + sm_iommu_enable_pcicaps(dev); if (!ret) info->domain_attached = true; @@ -4359,7 +4369,6 @@ const struct iommu_ops intel_iommu_ops = { .domain_alloc_sva = intel_svm_domain_alloc, .domain_alloc_nested = intel_iommu_domain_alloc_nested, .probe_device = intel_iommu_probe_device, - .probe_finalize = intel_iommu_probe_finalize, .release_device = intel_iommu_release_device, .get_resv_regions = intel_iommu_get_resv_regions, .device_group = intel_iommu_device_group, -- 2.43.0

2 weeks, 4 days

3
2
0 0

[regression v6.12.30..v6.12.32] mmc1: mmc_select_hs400 failed, error -110 / boot regression on Lenovo IdeaPad 1 15ADA7

by Salvatore Bonaccorso

Hi In Debian we got a regression report booting on a Lenovo IdeaPad 1 15ADA7 dropping finally into the initramfs shell after updating from 6.12.30 to 6.12.32 with messages before dropping into the intiramfs shell: mmc1: mmc_select_hs400 failed, error -110 mmc1: error -110 whilst initialising MMC card The original report is at https://bugs.debian.org/1107979 and the reporter tested as well kernel up to 6.15.3 which still fails to boot. Another similar report landed with after the same version update as https://bugs.debian.org/1107979 . I only see three commits touching drivers/mmc between 6.12.30..6.12.32: 28306c58daf8 ("mmc: sdhci: Disable SD card clock before changing parameters") 38828e0dc771 ("mmc: dw_mmc: add exynos7870 DW MMC support") 67bb2175095e ("mmc: host: Wait for Vdd to settle on card power off") I have found a potential similar issue reported in ArchLinux at https://bbs.archlinux.org/viewtopic.php?id=306024 I have asked if we can get more information out of the boot, but maybe this regression report already rings bell for you? #regzbot introduced v6.12.30..v6.12.32 #regzbot link: https://bugs.debian.org/1107979 #regzbot link: https://bbs.archlinux.org/viewtopic.php?id=306024 Regards, Salvatore

2 weeks, 4 days

4
10
0 0

[PATCH v3 4/4] wifi: ath12k: fix dest ring-buffer corruption when ring is full

by Johan Hovold

Add the missing memory barriers to make sure that destination ring descriptors are read before updating the tail pointer (and passing ownership to the device) to avoid memory corruption on weakly ordered architectures like aarch64 when the ring is full. Tested-on: WCN7850 hw2.0 WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3 Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices") Cc: stable(a)vger.kernel.org # 6.3 Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> --- drivers/net/wireless/ath/ath12k/hal.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath12k/hal.c b/drivers/net/wireless/ath/ath12k/hal.c index d8193d9577bb..6406fcf5d69f 100644 --- a/drivers/net/wireless/ath/ath12k/hal.c +++ b/drivers/net/wireless/ath/ath12k/hal.c @@ -2170,7 +2170,6 @@ void ath12k_hal_srng_access_end(struct ath12k_base *ab, struct hal_srng *srng) { lockdep_assert_held(&srng->lock); - /* TODO: See if we need a write memory barrier here */ if (srng->flags & HAL_SRNG_FLAGS_LMAC_RING) { /* For LMAC rings, ring pointer updates are done through FW and * hence written to a shared memory location that is read by FW @@ -2185,7 +2184,11 @@ void ath12k_hal_srng_access_end(struct ath12k_base *ab, struct hal_srng *srng) WRITE_ONCE(*srng->u.src_ring.hp_addr, srng->u.src_ring.hp); } else { srng->u.dst_ring.last_hp = *srng->u.dst_ring.hp_addr; - *srng->u.dst_ring.tp_addr = srng->u.dst_ring.tp; + /* Make sure descriptor is read before updating the + * tail pointer. + */ + dma_mb(); + WRITE_ONCE(*srng->u.dst_ring.tp_addr, srng->u.dst_ring.tp); } } else { if (srng->ring_dir == HAL_SRNG_DIR_SRC) { @@ -2201,6 +2204,10 @@ void ath12k_hal_srng_access_end(struct ath12k_base *ab, struct hal_srng *srng) srng->u.src_ring.hp); } else { srng->u.dst_ring.last_hp = *srng->u.dst_ring.hp_addr; + /* Make sure descriptor is read before updating the + * tail pointer. + */ + mb(); ath12k_hif_write32(ab, (unsigned long)srng->u.dst_ring.tp_addr - (unsigned long)ab->mem, -- 2.49.0

2 weeks, 4 days

2
1
0 0

[PATCH v3 3/4] wifi: ath12k: fix source ring-buffer corruption

by Johan Hovold

Add the missing memory barrier to make sure that LMAC source ring descriptors are written before updating the head pointer to avoid passing stale data to the firmware on weakly ordered architectures like aarch64. Note that non-LMAC rings use MMIO write accessors which have the required write memory barrier. Tested-on: WCN7850 hw2.0 WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3 Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices") Cc: stable(a)vger.kernel.org # 6.3 Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> --- drivers/net/wireless/ath/ath12k/hal.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath12k/hal.c b/drivers/net/wireless/ath/ath12k/hal.c index 726969cfcaec..d8193d9577bb 100644 --- a/drivers/net/wireless/ath/ath12k/hal.c +++ b/drivers/net/wireless/ath/ath12k/hal.c @@ -2178,7 +2178,11 @@ void ath12k_hal_srng_access_end(struct ath12k_base *ab, struct hal_srng *srng) if (srng->ring_dir == HAL_SRNG_DIR_SRC) { srng->u.src_ring.last_tp = *(volatile u32 *)srng->u.src_ring.tp_addr; - *srng->u.src_ring.hp_addr = srng->u.src_ring.hp; + /* Make sure descriptor is written before updating the + * head pointer. + */ + dma_wmb(); + WRITE_ONCE(*srng->u.src_ring.hp_addr, srng->u.src_ring.hp); } else { srng->u.dst_ring.last_hp = *srng->u.dst_ring.hp_addr; *srng->u.dst_ring.tp_addr = srng->u.dst_ring.tp; @@ -2187,6 +2191,10 @@ void ath12k_hal_srng_access_end(struct ath12k_base *ab, struct hal_srng *srng) if (srng->ring_dir == HAL_SRNG_DIR_SRC) { srng->u.src_ring.last_tp = *(volatile u32 *)srng->u.src_ring.tp_addr; + /* Assume implementation use an MMIO write accessor + * which has the required wmb() so that the descriptor + * is written before the updating the head pointer. + */ ath12k_hif_write32(ab, (unsigned long)srng->u.src_ring.hp_addr - (unsigned long)ab->mem, -- 2.49.0

2 weeks, 4 days

2
1
0 0

[PATCH v3 1/4] wifi: ath12k: fix dest ring-buffer corruption

by Johan Hovold

Add the missing memory barrier to make sure that destination ring descriptors are read after the head pointers to avoid using stale data on weakly ordered architectures like aarch64. The barrier is added to the ath12k_hal_srng_access_begin() helper for symmetry with follow-on fixes for source ring buffer corruption which will add barriers to ath12k_hal_srng_access_end(). Tested-on: WCN7850 hw2.0 WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3 Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices") Cc: stable(a)vger.kernel.org # 6.3 Signed-off-by: Johan Hovold <johan+linaro(a)kernel.org> --- drivers/net/wireless/ath/ath12k/ce.c | 3 --- drivers/net/wireless/ath/ath12k/hal.c | 17 ++++++++++++++--- 2 files changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/net/wireless/ath/ath12k/ce.c b/drivers/net/wireless/ath/ath12k/ce.c index 3f3439262cf4..f7c15b547504 100644 --- a/drivers/net/wireless/ath/ath12k/ce.c +++ b/drivers/net/wireless/ath/ath12k/ce.c @@ -433,9 +433,6 @@ static int ath12k_ce_completed_recv_next(struct ath12k_ce_pipe *pipe, goto err; } - /* Make sure descriptor is read after the head pointer. */ - dma_rmb(); - *nbytes = ath12k_hal_ce_dst_status_get_length(desc); *skb = pipe->dest_ring->skb[sw_index]; diff --git a/drivers/net/wireless/ath/ath12k/hal.c b/drivers/net/wireless/ath/ath12k/hal.c index a301898e5849..f8bd3837b9dc 100644 --- a/drivers/net/wireless/ath/ath12k/hal.c +++ b/drivers/net/wireless/ath/ath12k/hal.c @@ -2143,13 +2143,24 @@ void *ath12k_hal_srng_src_get_next_reaped(struct ath12k_base *ab, void ath12k_hal_srng_access_begin(struct ath12k_base *ab, struct hal_srng *srng) { + u32 hp; + lockdep_assert_held(&srng->lock); - if (srng->ring_dir == HAL_SRNG_DIR_SRC) + if (srng->ring_dir == HAL_SRNG_DIR_SRC) { srng->u.src_ring.cached_tp = *(volatile u32 *)srng->u.src_ring.tp_addr; - else - srng->u.dst_ring.cached_hp = READ_ONCE(*srng->u.dst_ring.hp_addr); + } else { + hp = READ_ONCE(*srng->u.dst_ring.hp_addr); + + if (hp != srng->u.dst_ring.cached_hp) { + srng->u.dst_ring.cached_hp = hp; + /* Make sure descriptor is read after the head + * pointer. + */ + dma_rmb(); + } + } } /* Update cached ring head/tail pointers to HW. ath12k_hal_srng_access_begin() -- 2.49.0

2 weeks, 4 days

2
1
0 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

Linux-stable-mirror