drm/amdgpu: Fix ras debugfs data parse
Unzero char is accepted by sscanf, so when data is structure but
unexpectedly return error invalid;
Signed-off-by: xinhui pan <[email protected]>
Reviewed-by: Feifei Xu <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 74a65a6..1acaa84 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -241,7 +241,7 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
op = 1;
else if (sscanf(str, "inject %32s %8s", block_name, err) == 2)
op = 2;
- else if (sscanf(str, "%32s", block_name) == 1)
+ else if (str[0] && str[1] && str[2] && str[3])
/* ascii string, but commands are not matched. */
return -EINVAL;
