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iommu/amd: Fix error handling for pdev_pri_ats_enable() 

[ Upstream commit 080920e521 ]

Current code throws kernel warning if it fails to enable pasid/pri [1].
Do not call pci_disable_[pasid/pri] if pci_enable_[pasid/pri] failed.

[1] https://lore.kernel.org/linux-iommu/15d0f9ff-2a56-b3e9-5b45-e6b23300ae3b@leemhuis.info/

Reported-by: Matt Fagnani <matt.fagnani@bell.net>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20230111121503.5931-1-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Vasant Hegde 2023-01-11 12:15:03 +00:00 committed by Greg Kroah-Hartman
parent 2ec4d5ef08
commit 60ac0a6de6
1 changed files with 7 additions and 5 deletions
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12
drivers/iommu/amd/iommu.c
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@ -1712,27 +1712,29 @@ static int pdev_pri_ats_enable(struct pci_dev *pdev)
/* Only allow access to user-accessible pages */
ret = pci_enable_pasid(pdev, 0);
if (ret)
goto out_err;
return ret;
/* First reset the PRI state of the device */
ret = pci_reset_pri(pdev);
if (ret)
goto out_err;
goto out_err_pasid;
/* Enable PRI */
/* FIXME: Hardcode number of outstanding requests for now */
ret = pci_enable_pri(pdev, 32);
if (ret)
goto out_err;
goto out_err_pasid;
ret = pci_enable_ats(pdev, PAGE_SHIFT);
if (ret)
goto out_err;
goto out_err_pri;
return 0;
out_err:
out_err_pri:
pci_disable_pri(pdev);
out_err_pasid:
pci_disable_pasid(pdev);
return ret;