We could walk of a bad list otherwise when someone concurrently unbinds stuff for fun.
I've suspected this as the root-cause behind seemingly inconsistent state, but alas it's not. Signed-off-by: Daniel Vetter <[email protected]> --- drivers/gpu/drm/i915/i915_debugfs.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 0e0e6b6bffd1..5c029bd53a26 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -513,6 +513,11 @@ static int i915_gem_pageflip_info(struct seq_file *m, void *data) struct drm_device *dev = node->minor->dev; unsigned long flags; struct intel_crtc *crtc; + int ret; + + ret = mutex_lock_interruptible(&dev->struct_mutex); + if (ret) + return ret; for_each_intel_crtc(dev, crtc) { const char pipe = pipe_name(crtc->pipe); @@ -554,6 +559,8 @@ static int i915_gem_pageflip_info(struct seq_file *m, void *data) spin_unlock_irqrestore(&dev->event_lock, flags); } + mutex_unlock(&dev->struct_mutex); + return 0; } -- 1.8.1.4 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
