On Sat, 08 Nov 2014, Rob Clark robdclark@gmail.com wrote:
Let's make things a bit easier to debug when things go bad (potentially under console_lock).
Signed-off-by: Rob Clark robdclark@gmail.com
drivers/gpu/drm/drm_irq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index 5ef03c2..c4edea9 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -1029,7 +1029,8 @@ void drm_vblank_put(struct drm_device *dev, int crtc) { struct drm_vblank_crtc *vblank = &dev->vblank[crtc];
- BUG_ON(atomic_read(&vblank->refcount) == 0);
- if (WARN_ON(atomic_read(&vblank->refcount) == 0))
return;
While I approve of the change, I'd like to promote the use of WARN with a message instead of WARN_ON. See [1]. In fact it lead to us redefining WARN_ON in i915 [2].
Thanks, Jani.
[1] http://mid.gmane.org/87y4sfkoy4.fsf@intel.com [2] http://mid.gmane.org/1414510350-15713-1-git-send-email-miku@iki.fi
if (WARN_ON(crtc >= dev->num_crtcs)) return; -- 1.9.3
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