We grab the struct_mutex in intel_crtc_page_flip, but if we are wedged
or a reset is in progress we bail early but never seem to actually
release the lock.
Fixes: 7f1847ebf48b ("drm/i915: Simplify checking of GPU reset_counter in
display pageflips")
Cc: Chris Wilson <ch...@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.a...@intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 5d11002319f7..772a72a21513 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12214,7 +12214,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
intel_crtc->reset_count = i915_reset_count(&dev_priv->gpu_error);
if (i915_reset_in_progress_or_wedged(&dev_priv->gpu_error)) {
ret = -EIO;
- goto cleanup;
+ goto unlock;
}
atomic_inc(&intel_crtc->unpin_work_count);
@@ -12302,6 +12302,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
intel_unpin_fb_obj(fb, crtc->primary->state->rotation);
cleanup_pending:
atomic_dec(&intel_crtc->unpin_work_count);
+unlock:
mutex_unlock(&dev->struct_mutex);
cleanup:
crtc->primary->fb = old_fb;
--
2.9.3
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