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iommu/amd: Check return value of mmu_notifier_register()

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Аdded a return value check for the function
mmu_notifier_register().

Return value of a function 'mmu_notifier_register'
called at iommu_v2.c:642 is not checked,
 but it is usually checked for this function

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Denis Arefev <arefev@swemel.ru>
Link: https://lore.kernel.org/r/20221118104252.122809-1-arefev@swemel.ru
[joro: Fix commit message ]
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Denis Arefev 2022-11-18 13:42:52 +03:00 committed by Joerg Roedel
parent 6cf0981c22
commit b09b56734f
1 changed files with 3 additions and 1 deletions
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4
drivers/iommu/amd/iommu_v2.c
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@ -640,7 +640,9 @@ int amd_iommu_bind_pasid(struct pci_dev *pdev, u32 pasid,
if (pasid_state->mm == NULL)
goto out_free;
mmu_notifier_register(&pasid_state->mn, mm);
ret = mmu_notifier_register(&pasid_state->mn, mm);
if (ret)
goto out_free;
ret = set_pasid_state(dev_state, pasid_state, pasid);
if (ret)