Messages in this thread Patch in this message | | | From | Lu Baolu <> | Subject | [PATCH 1/1] iommu/vt-d: Fix error handling in sva enable/disable paths | Date | Wed, 8 Feb 2023 13:15:59 +0800 |
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Roll back all previous actions in error paths of intel_iommu_enable_sva() and intel_iommu_disable_sva().
Fixes: d5b9e4bfe0d8 ("iommu/vt-d: Report prq to io-pgfault framework") Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> --- drivers/iommu/intel/iommu.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index a049178cd9f8..36d1867159d7 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4650,8 +4650,12 @@ static int intel_iommu_enable_sva(struct device *dev) return -EINVAL; ret = iopf_queue_add_device(iommu->iopf_queue, dev); - if (!ret) - ret = iommu_register_device_fault_handler(dev, iommu_queue_iopf, dev); + if (ret) + return ret; + + ret = iommu_register_device_fault_handler(dev, iommu_queue_iopf, dev); + if (ret) + iopf_queue_remove_device(iommu->iopf_queue, dev); return ret; } @@ -4663,8 +4667,12 @@ static int intel_iommu_disable_sva(struct device *dev) int ret; ret = iommu_unregister_device_fault_handler(dev); - if (!ret) - ret = iopf_queue_remove_device(iommu->iopf_queue, dev); + if (ret) + return ret; + + ret = iopf_queue_remove_device(iommu->iopf_queue, dev); + if (ret) + iommu_register_device_fault_handler(dev, iommu_queue_iopf, dev); return ret; } -- 2.34.1
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