drm/amdgpu: fix the issue of checking on message mapping

The navi10_message_map[index] scope should be in PPSMC_Message_Count not in
SMU_MSG_MAX_COUNT.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
index 7fb2a06..a233f34 100644 (file)
--- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
@@ -101,10 +101,15 @@ static int navi10_message_map[SMU_MSG_MAX_COUNT] = {
 
 static int navi10_get_smu_msg_index(struct smu_context *smc, uint32_t index)
 {
-       if (index > SMU_MSG_MAX_COUNT || index > PPSMC_Message_Count)
+       int val;
+       if (index > SMU_MSG_MAX_COUNT)
                return -EINVAL;
-       return navi10_message_map[index];
 
+       val = navi10_message_map[index];
+       if (val > PPSMC_Message_Count)
+               return -EINVAL;
+
+       return val;
 }
 
 static int