Signed-off-by: Huang Rui <ray.huang at amd.com>
---
V1 -> V2:
- Add READ_ONCE to avoid complier might cause to read as previous fence value.
I will refine fence checking with fence interface at amdgpu_fence.c after S3
stress issue completed as Christian's suggestion.
Thanks,
Ray
---
drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 5bed483..af3c87b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -130,7 +130,7 @@ psp_cmd_submit_buf(struct psp_context *psp,
ret = psp_cmd_submit(psp, ucode, cmd_buf_mc_addr,
fence_mc_addr, index);
- while (*((unsigned int *)psp->fence_buf) != index) {
+ while (READ_ONCE(*((unsigned int *)psp->fence_buf)) < index) {
msleep(1);
}
--
2.7.4
