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drm/omap: fix crash on module unload

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

967dd48417 ("drm: remove
drm_vblank_no_hw_counter assignment from driver code")

We shut down all the crtcs at unload time before calling
omap_drm_irq_uninstall, so the code in omap_drm_irq_uninstall() is
unnecessary and can be removed.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Tomi Valkeinen 2017-03-24 09:58:49 +02:00
parent 8a54aa9285
commit c9af3ed731
1 changed files with 0 additions and 14 deletions
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14
drivers/gpu/drm/omapdrm/omap_irq.c
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@ -285,25 +285,11 @@ int omap_drm_irq_install(struct drm_device *dev)
void omap_drm_irq_uninstall(struct drm_device *dev)
{
struct omap_drm_private *priv = dev->dev_private;
unsigned long irqflags;
int i;
if (!dev->irq_enabled)
return;
dev->irq_enabled = false;
/* Wake up any waiters so they don't hang. */
if (dev->num_crtcs) {
spin_lock_irqsave(&dev->vbl_lock, irqflags);
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);
}
priv->dispc_ops->free_irq(dev);
}