Qian Cai 8cf6650421 iommu/amd: fix a crash in iova_magazine_free_pfns ... The commit b3aa14f022 ("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: b3aa14f022 ("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>		2019-07-21 09:57:13 -07:00
..
amd_iommu_debugfs.c
amd_iommu_init.c
amd_iommu_proto.h
amd_iommu_types.h
amd_iommu_v2.c
amd_iommu.c	iommu/amd: fix a crash in iova_magazine_free_pfns	2019-07-21 09:57:13 -07:00
arm-smmu-regs.h
arm-smmu-v3.c
arm-smmu.c
dma-iommu.c	dma-mapping updates for Linux 5.3	2019-07-12 15:13:55 -07:00
dmar.c
exynos-iommu.c
fsl_pamu_domain.c
fsl_pamu_domain.h
fsl_pamu.c
fsl_pamu.h
hyperv-iommu.c
intel_irq_remapping.c
intel-iommu-debugfs.c
intel-iommu.c
intel-pasid.c
intel-pasid.h
intel-svm.c
io-pgtable-arm-v7s.c
io-pgtable-arm.c
io-pgtable.c
iommu-debugfs.c
iommu-sysfs.c
iommu-traces.c
iommu.c
iova.c
ipmmu-vmsa.c
irq_remapping.c
irq_remapping.h
Kconfig
Makefile
msm_iommu_hw-8xxx.h
msm_iommu.c
msm_iommu.h
mtk_iommu_v1.c
mtk_iommu.c
mtk_iommu.h
of_iommu.c
omap-iommu-debug.c
omap-iommu.c
omap-iommu.h
omap-iopgtable.h
qcom_iommu.c
rockchip-iommu.c
s390-iommu.c
tegra-gart.c
tegra-smmu.c
virtio-iommu.c	virtio, vhost: fixes, features, performance	2019-07-17 11:26:09 -07:00