[PATCH] drm/amdgpu: add missing error handling in function amdgpu_gmc_flush_gpu_tlb_pasid

[Bob Zhou]

Fix the unchecked return value warning by warning reported by
Coverity, so add error handling.

Signed-off-by: Bob Zhou <bob.z...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index 322b8ff67cde..3a7622611916 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -718,7 +718,11 @@ int amdgpu_gmc_flush_gpu_tlb_pasid(struct amdgpu_device 
*adev, uint16_t pasid,
                        ndw += kiq->pmf->invalidate_tlbs_size;
 
                spin_lock(&adev->gfx.kiq[inst].ring_lock);
-               amdgpu_ring_alloc(ring, ndw);
+               r = amdgpu_ring_alloc(ring, ndw);
+               if (r) {
+                       spin_unlock(&adev->gfx.kiq[inst].ring_lock);
+                       goto error_unlock_reset;
+               }
                if (adev->gmc.flush_tlb_needs_extra_type_2)
                        kiq->pmf->kiq_invalidate_tlbs(ring, pasid, 2, all_hub);
 
-- 
2.34.1