diff options
author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-08-31 21:27:29 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-08-31 21:27:29 -0700 |
commit | b63fe1ba4409774738c971d4e6f0b12b54cc2c65 (patch) | |
tree | 6f035e3502324a68427b548116d221129a66cf2c | |
parent | 0668b47205e42c04e9c1b594573be5a822ac7f09 (diff) | |
parent | 5a4e6dccbc0cd1b726820b782daebf887dcb95e9 (diff) |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
IB/mthca: Use IRQ safe locks to protect allocation bitmaps
-rw-r--r-- | drivers/infiniband/hw/mthca/mthca_allocator.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_allocator.c b/drivers/infiniband/hw/mthca/mthca_allocator.c index 25157f57a6d0..f930e55b58fc 100644 --- a/drivers/infiniband/hw/mthca/mthca_allocator.c +++ b/drivers/infiniband/hw/mthca/mthca_allocator.c @@ -41,9 +41,11 @@ /* Trivial bitmap-based allocator */ u32 mthca_alloc(struct mthca_alloc *alloc) { + unsigned long flags; u32 obj; - spin_lock(&alloc->lock); + spin_lock_irqsave(&alloc->lock, flags); + obj = find_next_zero_bit(alloc->table, alloc->max, alloc->last); if (obj >= alloc->max) { alloc->top = (alloc->top + alloc->max) & alloc->mask; @@ -56,19 +58,24 @@ u32 mthca_alloc(struct mthca_alloc *alloc) } else obj = -1; - spin_unlock(&alloc->lock); + spin_unlock_irqrestore(&alloc->lock, flags); return obj; } void mthca_free(struct mthca_alloc *alloc, u32 obj) { + unsigned long flags; + obj &= alloc->max - 1; - spin_lock(&alloc->lock); + + spin_lock_irqsave(&alloc->lock, flags); + clear_bit(obj, alloc->table); alloc->last = min(alloc->last, obj); alloc->top = (alloc->top + alloc->max) & alloc->mask; - spin_unlock(&alloc->lock); + + spin_unlock_irqrestore(&alloc->lock, flags); } int mthca_alloc_init(struct mthca_alloc *alloc, u32 num, u32 mask, |