[PATCH 3/3] mshv: release mutex on region invalidation failure

[Anirudh Rayabharam]

From: Anirudh Rayabharam (Microsoft) <anirudh@xxxxxxxxxxxxx>

In the region invalidation failure path in
mshv_region_interval_invalidate(), the region mutex is not released. Fix
it by releasing the mutex in the failure path.

Signed-off-by: Anirudh Rayabharam (Microsoft) <anirudh@xxxxxxxxxxxxx>
---
 drivers/hv/mshv_regions.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/hv/mshv_regions.c b/drivers/hv/mshv_regions.c
index 8abf80129f9b..30bacba6aec3 100644
--- a/drivers/hv/mshv_regions.c
+++ b/drivers/hv/mshv_regions.c
@@ -511,7 +511,7 @@ static bool mshv_region_interval_invalidate(struct mmu_interval_notifier *mni,
 	ret = mshv_region_remap_pages(region, HV_MAP_GPA_NO_ACCESS,
 				      page_offset, page_count);
 	if (ret)
-		goto out_fail;
+		goto out_unlock;
 
 	mshv_region_invalidate_pages(region, page_offset, page_count);
 
@@ -519,6 +519,8 @@ static bool mshv_region_interval_invalidate(struct mmu_interval_notifier *mni,
 
 	return true;
 
+out_unlock:
+	mutex_unlock(&region->mutex);
 out_fail:
 	WARN_ONCE(ret,
 		  "Failed to invalidate region %#llx-%#llx (range %#lx-%#lx, event: %u, pages %#llx-%#llx, mm: %#llx): %d\n",
-- 
2.34.1