From c767d74a9cdd1042046d02319d16b85d9aa8a8aa Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 22 Aug 2025 12:12:37 -0400
Subject: [PATCH 4894/5403] drm/amdgpu/userq: fix error handling of invalid
 doorbell

If the doorbell is invalid, be sure to set the r to an error
state so the function returns an error.

Reviewed-by: David (Ming Qiang) Wu <David.Wu3@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 7e2a5b0a9a165a7c51274aa01b18be29491b4345)
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
index c3ace8030530..8190c24a649a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
@@ -471,6 +471,7 @@ amdgpu_userq_create(struct drm_file *filp, union drm_amdgpu_userq *args)
 	if (index == (uint64_t)-EINVAL) {
 		drm_file_err(uq_mgr->file, "Failed to get doorbell for queue\n");
 		kfree(queue);
+		r = -EINVAL;
 		goto unlock;
 	}
 
-- 
2.54.0

