[PATCH 2/2] drm/xe/vf: Don't update GuC reset policy when changing wedged mode

[Lukasz Laguna]

Prevent the VF from attempting to update the GuC reset policy when
changing the wedged mode, as this operation is not supported for VFs.

Log a message to indicate that GuC may still cause engine reset even
with wedged_mode=2.

Signed-off-by: Lukasz Laguna <lukasz.laguna at intel.com>
---
 drivers/gpu/drm/xe/xe_debugfs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_debugfs.c b/drivers/gpu/drm/xe/xe_debugfs.c
index d0503959a8ed..062668d02365 100644
--- a/drivers/gpu/drm/xe/xe_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_debugfs.c
@@ -171,6 +171,11 @@ static ssize_t wedged_mode_set(struct file *f, const char __user *ubuf,
 
 	xe->wedged.mode = wedged_mode;
 
+	if (IS_SRIOV_VF(xe)) {
+		drm_info_once(&xe->drm, "VF can't change GuC's engine reset policy. GuC may still cause engine reset even with wedged_mode=2\n");
+		return size;
+	}
+
 	xe_pm_runtime_get(xe);
 	for_each_gt(gt, xe, id) {
 		ret = xe_guc_ads_scheduler_policy_toggle_reset(&gt->uc.guc.ads);
-- 
2.40.0