[PATCH next] drm/amdgpu: Fix double free in amdgpu_userq_fence_driver_alloc()

[Dan Carpenter]

The goto frees "fence_drv" so this is a double free bug.  There is no
need to call amdgpu_seq64_free(adev, fence_drv->va) since the seq64
allocation failed so change the goto to goto free_fence_drv.  Also
propagate the error code from amdgpu_seq64_alloc() instead of hard coding
it to -ENOMEM.

Fixes: e7cf21fbb277 ("drm/amdgpu: Few optimization and fixes for userq fence driver")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
index a4953d668972..b012fece91e8 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c
@@ -84,11 +84,8 @@ int amdgpu_userq_fence_driver_alloc(struct amdgpu_device *adev,
 	/* Acquire seq64 memory */
 	r = amdgpu_seq64_alloc(adev, &fence_drv->va, &fence_drv->gpu_addr,
 			       &fence_drv->cpu_addr);
-	if (r) {
-		kfree(fence_drv);
-		r = -ENOMEM;
-		goto free_seq64;
-	}
+	if (r)
+		goto free_fence_drv;
 
 	memset(fence_drv->cpu_addr, 0, sizeof(u64));
 
-- 
2.47.2