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iommu/amd: Fix pci device refcount leak in ppr_notifier()

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[ Upstream commit 6cf0981c22 ]

As comment of pci_get_domain_bus_and_slot() says, it returns
a pci device with refcount increment, when finish using it,
the caller must decrement the reference count by calling
pci_dev_put(). So call it before returning from ppr_notifier()
to avoid refcount leak.

Fixes: daae2d25a4 ("iommu/amd: Don't copy GCR3 table root pointer")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221118093604.216371-1-yangyingliang@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang 2022-11-18 17:36:04 +08:00 committed by Greg Kroah-Hartman
parent 26427454be
commit b0637f4bd4
1 changed files with 1 additions and 0 deletions
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1
drivers/iommu/amd/iommu_v2.c
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@ -587,6 +587,7 @@ static int ppr_notifier(struct notifier_block *nb, unsigned long e, void *data)
put_device_state(dev_state);
out:
pci_dev_put(pdev);
return ret;
}