From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Logs can get confusing when some operations are done multiple times
due to the ww mutex backoff. Add a debug print into
drm_modeset_backoff() so that at least the reason for the odd
looking logs will be obvious.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_modeset_lock.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c
index 81dd11901ffd..1277ff18d993 100644
--- a/drivers/gpu/drm/drm_modeset_lock.c
+++ b/drivers/gpu/drm/drm_modeset_lock.c
@@ -295,6 +295,8 @@ int drm_modeset_backoff(struct drm_modeset_acquire_ctx *ctx)
{
struct drm_modeset_lock *contended = ctx->contended;
+ DRM_DEBUG_KMS("Retrying to avoid deadlock\n");
+
ctx->contended = NULL;
if (WARN_ON(!contended))
--
2.19.2
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