iommu/amd: Drop pasid_state reference in ppr_notifer error path

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@suse.de>
Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>

diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c
index 574c71bdfcfa26e0ce3e58da5e116df40837c467..6ba707b998ff136c8ca7cbdd83a0122342427ed5 100644 (file)
--- 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: