From: Yang Yingliang <yangyingliang@huawei.com>
Date: Fri, 18 Nov 2022 17:36:04 +0800
Subject: iommu/amd: Fix pci device refcount leak in ppr_notifier()
Git-commit: 6cf0981c2233f97d56938d9d61845383d6eb227c
Patch-mainline: v6.2-rc1
References: git-fixes

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: daae2d25a477 ("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>
---
 drivers/iommu/amd/iommu_v2.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/amd/iommu_v2.c b/drivers/iommu/amd/iommu_v2.c
index 6a1f02c62dff..9f7fab49a5a9 100644
--- a/drivers/iommu/amd/iommu_v2.c
+++ b/drivers/iommu/amd/iommu_v2.c
@@ -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;
 }