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| author | Matthew Auld | 2016-11-28 11:36:48 +0100 |
|---|---|---|
| committer | Chris Wilson | 2016-11-29 10:25:04 +0100 |
| commit | ddbb271aea87fc6004d3c8bcdb0710e980c7ec85 (patch) | |
| tree | 790032e8c6ed1712fa121d90f5f0c6e62d8091c7 /drivers/gpu/drm/i915/intel_display.c | |
| parent | Revert "drm/i915/execlists: Use a local lock for dfs_link access" (diff) | |
| download | kernel-qcow2-linux-ddbb271aea87fc6004d3c8bcdb0710e980c7ec85.tar.gz kernel-qcow2-linux-ddbb271aea87fc6004d3c8bcdb0710e980c7ec85.tar.xz kernel-qcow2-linux-ddbb271aea87fc6004d3c8bcdb0710e980c7ec85.zip | |
drm/i915: drop the struct_mutex when wedged or trying to reset
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 <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161128103648.9235-1-matthew.auld@intel.com
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: <stable@vger.kernel.org> # v4.7+
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 7eb2399d9b40..04636552e98a 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -12206,7 +12206,7 @@ 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); @@ -12295,6 +12295,7 @@ cleanup_unpin: 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; |