drm: Make locked tasklet handling more robust.

Initialize the spinlock unconditionally when struct drm_device is filled in,
and return early in drm_locked_tasklet() if the driver doesn't support IRQs.

Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/char/drm/drm_stub.c b/drivers/char/drm/drm_stub.c
index 6f748e194cf9..5fd6dc0870cf 100644
--- a/drivers/char/drm/drm_stub.c
+++ b/drivers/char/drm/drm_stub.c
@@ -61,6 +61,7 @@ static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
 
         spin_lock_init(&dev->count_lock);
         spin_lock_init(&dev->drw_lock);
+        spin_lock_init(&dev->tasklet_lock);
         init_timer(&dev->timer);
         mutex_init(&dev->struct_mutex);
         mutex_init(&dev->ctxlist_mutex);