diff options
| author | Roland Dreier <rolandd@cisco.com> | 2006-06-17 20:37:41 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-06-17 20:37:41 -0700 |
| commit | c93b6fbaa99bb3a1552e14317296be14dde51dfb (patch) | |
| tree | bad61dc728f0eb28fcfdf01953cd0ae43a4b2350 /drivers/infiniband/hw/mthca/mthca_cq.c | |
| parent | c9c5d9feef86debee4d8e77a738ad86877cf371a (diff) | |
IB/mthca: Make all device methods truly reentrant
Documentation/infiniband/core_locking.txt says:
All of the methods in struct ib_device exported by a low-level
driver must be fully reentrant. The low-level driver is required to
perform all synchronization necessary to maintain consistency, even
if multiple function calls using the same object are run
simultaneously.
However, mthca's modify_qp, modify_srq and resize_cq methods are
currently not reentrant. Add a mutex to the QP, SRQ and CQ structures
so that these calls can be properly serialized.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_cq.c')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_cq.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_cq.c b/drivers/infiniband/hw/mthca/mthca_cq.c index 87a8f1166a3..3e27a084257 100644 --- a/drivers/infiniband/hw/mthca/mthca_cq.c +++ b/drivers/infiniband/hw/mthca/mthca_cq.c @@ -822,6 +822,7 @@ int mthca_init_cq(struct mthca_dev *dev, int nent, spin_lock_init(&cq->lock); cq->refcount = 1; init_waitqueue_head(&cq->wait); + mutex_init(&cq->mutex); memset(cq_context, 0, sizeof *cq_context); cq_context->flags = cpu_to_be32(MTHCA_CQ_STATUS_OK | |