diff options
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_provider.c')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_provider.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c index 8f89ba7c9147..230ae21db8fd 100644 --- a/drivers/infiniband/hw/mthca/mthca_provider.c +++ b/drivers/infiniband/hw/mthca/mthca_provider.c @@ -793,18 +793,24 @@ static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *uda if (entries < 1 || entries > dev->limits.max_cqes) return -EINVAL; + mutex_lock(&cq->mutex); + entries = roundup_pow_of_two(entries + 1); - if (entries == ibcq->cqe + 1) - return 0; + if (entries == ibcq->cqe + 1) { + ret = 0; + goto out; + } if (cq->is_kernel) { ret = mthca_alloc_resize_buf(dev, cq, entries); if (ret) - return ret; + goto out; lkey = cq->resize_buf->buf.mr.ibmr.lkey; } else { - if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) - return -EFAULT; + if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) { + ret = -EFAULT; + goto out; + } lkey = ucmd.lkey; } @@ -821,7 +827,7 @@ static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *uda cq->resize_buf = NULL; spin_unlock_irq(&cq->lock); } - return ret; + goto out; } if (cq->is_kernel) { @@ -848,7 +854,10 @@ static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *uda } else ibcq->cqe = entries - 1; - return 0; +out: + mutex_unlock(&cq->mutex); + + return ret; } static int mthca_destroy_cq(struct ib_cq *cq) |