diff options
| author | Bryan O'Sullivan <bos@pathscale.com> | 2006-09-28 09:00:03 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-09-28 11:16:34 -0700 |
| commit | aa4eaed702cb5d07babaaa04596436156b922249 (patch) | |
| tree | a191d501fe979fb9440859a4155bb1efac4a797e /drivers | |
| parent | 11b054fe1d453954449a86de178bb98274bb86ef (diff) | |
| download | linux-stable-aa4eaed702cb5d07babaaa04596436156b922249.tar.gz linux-stable-aa4eaed702cb5d07babaaa04596436156b922249.tar.bz2 linux-stable-aa4eaed702cb5d07babaaa04596436156b922249.zip | |
IB/ipath: Lock and count allocated CQs properly
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_cq.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_cq.c b/drivers/infiniband/hw/ipath/ipath_cq.c index 049221bc590e..00440d5c91e0 100644 --- a/drivers/infiniband/hw/ipath/ipath_cq.c +++ b/drivers/infiniband/hw/ipath/ipath_cq.c @@ -177,11 +177,6 @@ struct ib_cq *ipath_create_cq(struct ib_device *ibdev, int entries, goto done; } - if (dev->n_cqs_allocated == ib_ipath_max_cqs) { - ret = ERR_PTR(-ENOMEM); - goto done; - } - /* Allocate the completion queue structure. */ cq = kmalloc(sizeof(*cq), GFP_KERNEL); if (!cq) { @@ -237,6 +232,16 @@ struct ib_cq *ipath_create_cq(struct ib_device *ibdev, int entries, } else cq->ip = NULL; + spin_lock(&dev->n_cqs_lock); + if (dev->n_cqs_allocated == ib_ipath_max_cqs) { + spin_unlock(&dev->n_cqs_lock); + ret = ERR_PTR(-ENOMEM); + goto bail_wc; + } + + dev->n_cqs_allocated++; + spin_unlock(&dev->n_cqs_lock); + /* * ib_create_cq() will initialize cq->ibcq except for cq->ibcq.cqe. * The number of entries should be >= the number requested or return @@ -253,7 +258,6 @@ struct ib_cq *ipath_create_cq(struct ib_device *ibdev, int entries, ret = &cq->ibcq; - dev->n_cqs_allocated++; goto done; bail_wc: @@ -280,7 +284,9 @@ int ipath_destroy_cq(struct ib_cq *ibcq) struct ipath_cq *cq = to_icq(ibcq); tasklet_kill(&cq->comptask); + spin_lock(&dev->n_cqs_lock); dev->n_cqs_allocated--; + spin_unlock(&dev->n_cqs_lock); if (cq->ip) kref_put(&cq->ip->ref, ipath_release_mmap_info); else |