drm: don't call the vblank tasklet with irqs disabled.
If a specific tasklet shares data with irq context,
it needs to take a private irq-blocking spinlock within
the tasklet itself.
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_lock.c b/drivers/gpu/drm/drm_lock.c
index 0998723..d78e0dc 100644
--- a/drivers/gpu/drm/drm_lock.c
+++ b/drivers/gpu/drm/drm_lock.c
@@ -150,6 +150,7 @@
{
struct drm_lock *lock = data;
unsigned long irqflags;
+ void (*tasklet_func)(struct drm_device *);
if (lock->context == DRM_KERNEL_CONTEXT) {
DRM_ERROR("Process %d using kernel context %d\n",
@@ -158,14 +159,11 @@
}
spin_lock_irqsave(&dev->tasklet_lock, irqflags);
-
- if (dev->locked_tasklet_func) {
- dev->locked_tasklet_func(dev);
-
- dev->locked_tasklet_func = NULL;
- }
-
+ tasklet_func = dev->locked_tasklet_func;
+ dev->locked_tasklet_func = NULL;
spin_unlock_irqrestore(&dev->tasklet_lock, irqflags);
+ if (tasklet_func != NULL)
+ tasklet_func(dev);
atomic_inc(&dev->counts[_DRM_STAT_UNLOCKS]);