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| author | Kumar Sanghvi <kumaras@chelsio.com> | 2011-10-24 21:20:22 +0530 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2011-10-31 11:33:17 -0700 |
| commit | f7cc25d018f1e9af6767ee7774bbe83452e9fdf4 (patch) | |
| tree | 43d10d7038f8295b4ad92e938b0c705db5ce58b3 /drivers/infiniband/hw/cxgb3/iwch_provider.h | |
| parent | 976d167615b64e14bc1491ca51d424e2ba9a5e84 (diff) | |
| download | blackbird-op-linux-f7cc25d018f1e9af6767ee7774bbe83452e9fdf4.tar.gz blackbird-op-linux-f7cc25d018f1e9af6767ee7774bbe83452e9fdf4.zip | |
RDMA/cxgb3: Serialize calls to CQ's comp_handler
iw_cxgb3 has a potential problem where a CQ's comp_handler can get
called simultaneously from different places in iw_cxgb3 driver. This
does not comply with Documentation/infiniband/core_locking.txt, which
states that at a given point of time, there should be only one
callback per CQ should be active.
Such problem was reported by Parav Pandit <Parav.Pandit@Emulex.Com>
for iw_cxgb4 driver. Based on discussion between Parav Pandit and
Steve Wise, this patch fixes the above problem by serializing the
calls to a CQ's comp_handler using a spin_lock.
Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/cxgb3/iwch_provider.h')
| -rw-r--r-- | drivers/infiniband/hw/cxgb3/iwch_provider.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.h b/drivers/infiniband/hw/cxgb3/iwch_provider.h index 9a342c9b220d..87c14b0c5ac0 100644 --- a/drivers/infiniband/hw/cxgb3/iwch_provider.h +++ b/drivers/infiniband/hw/cxgb3/iwch_provider.h @@ -103,6 +103,7 @@ struct iwch_cq { struct iwch_dev *rhp; struct t3_cq cq; spinlock_t lock; + spinlock_t comp_handler_lock; atomic_t refcnt; wait_queue_head_t wait; u32 __user *user_rptr_addr; |
