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drm/i915: Prevent module unload to avoid random memory corruption

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The i915 driver has quite a few module unload bugs, the known ones at
least have fixes that are targeting 2.6.37. However, in order to
maintain a stable kernel, we should prevent this known random memory
corruption following driver unload. This should have very low impact on
normal users who are unlikely to need to unload the i915 driver.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@kernel.org
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-10-08 13:40:27 +01:00
parent 6b0cd00bc3
commit 6939a5aca7
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_dma.c
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@ -2231,6 +2231,9 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
dev_priv->mchdev_lock = &mchdev_lock;
spin_unlock(&mchdev_lock);
/* XXX Prevent module unload due to memory corruption bugs. */
__module_get(THIS_MODULE);
return 0;
out_workqueue_free: