[PATCHv2 31/31] drm/omap: fix crash on module unload

[Tomi Valkeinen]

When unloading omapdrm we get a NULL pointer deref in
omap_drm_irq_uninstall(). This is caused by:

967dd48417874dd25491a4e933648f394a64f70f ("drm: remove
drm_vblank_no_hw_counter assignment from driver code")

As OMAP DSS does not have a HW vblank counter, vblank[i].last is anyway
always 0, so we can just remove the call to get_vblank_counter().

Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
---
 drivers/gpu/drm/omapdrm/omap_irq.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_irq.c b/drivers/gpu/drm/omapdrm/omap_irq.c
index 26a3c06aa14d..130fdc3225ed 100644
--- a/drivers/gpu/drm/omapdrm/omap_irq.c
+++ b/drivers/gpu/drm/omapdrm/omap_irq.c
@@ -299,8 +299,6 @@ void omap_drm_irq_uninstall(struct drm_device *dev)
 		for (i = 0; i < dev->num_crtcs; i++) {
 			wake_up(&dev->vblank[i].queue);
 			dev->vblank[i].enabled = false;
-			dev->vblank[i].last =
-				dev->driver->get_vblank_counter(dev, i);
 		}
 		spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
 	}
-- 
2.7.4