[PATCH 5/9] iommu/amd: Drop pasid_state reference in ppr_notifer error path

[Joerg Roedel]

From: Joerg Roedel <jroedel@xxxxxxx>

In case we are not able to allocate a fault structure a
reference to the pasid_state will be leaked. Fix that by
dropping the reference in the error path in case we hold
one.

Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Tested-by: Oded Gabbay <Oded.Gabbay@xxxxxxx>
---
 drivers/iommu/amd_iommu_v2.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c
index 574c71b..6ba707b 100644
--- a/drivers/iommu/amd_iommu_v2.c
+++ b/drivers/iommu/amd_iommu_v2.c
@@ -607,6 +607,10 @@ static int ppr_notifier(struct notifier_block *nb, unsigned long e, void *data)
 	ret = NOTIFY_OK;
 
 out_drop_state:
+
+	if (ret != NOTIFY_OK && pasid_state)
+		put_pasid_state(pasid_state);
+
 	put_device_state(dev_state);
 
 out:
-- 
1.7.9.5


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