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TencentOS-kernel/drivers/iommu
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Qian Cai bd8f9050b6 iommu/amd: fix a crash in iova_magazine_free_pfns 
The commit b3aa14f02254 ("iommu: remove the mapping_error dma_map_ops
method") incorrectly changed the checking from dma_ops_alloc_iova() in
map_sg() causes a crash under memory pressure as dma_ops_alloc_iova()
never return DMA_MAPPING_ERROR on failure but 0, so the error handling
is all wrong.

   kernel BUG at drivers/iommu/iova.c:801!
    Workqueue: kblockd blk_mq_run_work_fn
    RIP: 0010:iova_magazine_free_pfns+0x7d/0xc0
    Call Trace:
     free_cpu_cached_iovas+0xbd/0x150
     alloc_iova_fast+0x8c/0xba
     dma_ops_alloc_iova.isra.6+0x65/0xa0
     map_sg+0x8c/0x2a0
     scsi_dma_map+0xc6/0x160
     pqi_aio_submit_io+0x1f6/0x440 [smartpqi]
     pqi_scsi_queue_command+0x90c/0xdd0 [smartpqi]
     scsi_queue_rq+0x79c/0x1200
     blk_mq_dispatch_rq_list+0x4dc/0xb70
     blk_mq_sched_dispatch_requests+0x249/0x310
     __blk_mq_run_hw_queue+0x128/0x200
     blk_mq_run_work_fn+0x27/0x30
     process_one_work+0x522/0xa10
     worker_thread+0x63/0x5b0
     kthread+0x1d2/0x1f0
     ret_from_fork+0x22/0x40

Fixes: b3aa14f02254 ("iommu: remove the mapping_error dma_map_ops method")
Signed-off-by: Qian Cai <cai@lca.pw>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2020-05-29 10:39:16 +08:00
..
Kconfig Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
Makefile Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
amd_iommu.c iommu/amd: fix a crash in iova_magazine_free_pfns 2020-05-29 10:39:16 +08:00
amd_iommu_init.c iommu/amd: Add support for IOMMU XT mode 2020-01-02 12:19:07 +08:00
amd_iommu_proto.h Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
amd_iommu_types.h iommu/amd: Add support for IOMMU XT mode 2020-01-02 12:19:07 +08:00
amd_iommu_v2.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
arm-smmu-regs.h Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
arm-smmu-v3.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
arm-smmu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
dma-iommu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
dmar.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
exynos-iommu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
fsl_pamu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
fsl_pamu.h Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
fsl_pamu_domain.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
fsl_pamu_domain.h Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
intel-iommu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
intel-svm.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
intel_irq_remapping.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
io-pgtable-arm-v7s.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
io-pgtable-arm.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
io-pgtable.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
io-pgtable.h Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
iommu-sysfs.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
iommu-traces.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
iommu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
iova.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
ipmmu-vmsa.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
irq_remapping.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
irq_remapping.h Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
msm_iommu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
msm_iommu.h Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
msm_iommu_hw-8xxx.h Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
mtk_iommu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
mtk_iommu.h Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
mtk_iommu_v1.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
of_iommu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
omap-iommu-debug.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
omap-iommu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
omap-iommu.h Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
omap-iopgtable.h Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
qcom_iommu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
rockchip-iommu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
s390-iommu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
tegra-gart.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00
tegra-smmu.c Init Repo base on 4.14.105 long term, and add base tlinux kernel interfaces 2020-01-02 10:51:04 +08:00