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ttm: Fix a spinlock bug.

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This commit is contained in:
Thomas Hellstrom 2009-02-17 09:03:05 +01:00
parent 99825d5eac
commit e8eb30ad8b
1 changed files with 5 additions and 4 deletions
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9
linux-core/ttm/ttm_bo.c
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@ -143,6 +143,7 @@ int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
bool no_wait, bool use_sequence, uint32_t sequence)
{
struct ttm_bo_device *bdev = bo->bdev;
int ret;
while (unlikely(atomic_cmpxchg(&bo->reserved, 0, 1) != 0)) {
if (use_sequence && bo->seq_valid &&
@ -154,11 +155,11 @@ int ttm_bo_reserve_locked(struct ttm_buffer_object *bo,
return -EBUSY;
spin_unlock(&bdev->lru_lock);
if (ttm_bo_wait_unreserved(bo, interruptible) != 0)
return -ERESTART;
ret = ttm_bo_wait_unreserved(bo, interruptible);
spin_lock(&bdev->lru_lock);
if (unlikely(ret))
return ret;
}
if (use_sequence) {