drm/amdgpu: add psp cmd submit timeout

Signed-off-by: xinhui pan <xinhui.pan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index c1b862016245..7e3e1d588d74 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -120,6 +120,7 @@ psp_cmd_submit_buf(struct psp_context *psp,
 {
         int ret;
         int index;
+        int timeout = 2000;
 
         memset(psp->cmd_buf_mem, 0, PSP_CMD_BUFFER_SIZE);
 
@@ -133,8 +134,11 @@ psp_cmd_submit_buf(struct psp_context *psp,
                 return ret;
         }
 
-        while (*((unsigned int *)psp->fence_buf) != index)
+        while (*((unsigned int *)psp->fence_buf) != index) {
+                if (--timeout == 0)
+                        return -EINVAL;
                 msleep(1);
+        }
 
         /* In some cases, psp response status is not 0 even there is no
          * problem while the command is submitted. Some version of PSP FW