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drm: fix regression in drm locking since BKL removal.

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This locking path needs proper auditing but probably too late for changes at this point for 2.6.36, so lets go with the quick fix, which is to drop the lock around schedule.

Reported-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Arnd Bergmann 2010-08-27 08:55:28 +10:00 committed by Dave Airlie
parent 12acd90f0b
commit 08f2e669a8
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/drm_lock.c
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@ -92,7 +92,9 @@ int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv)
}
/* Contention */
mutex_unlock(&drm_global_mutex);
schedule();
mutex_lock(&drm_global_mutex);
if (signal_pending(current)) {
ret = -EINTR;
break;