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| author | Yishai Hadas <yishaih@mellanox.com> | 2013-08-01 18:49:53 +0300 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2013-08-13 11:21:32 -0700 |
| commit | 73c40c616a33fcb7961b3c90a91b550813129b3e (patch) | |
| tree | 6c9cc5b71a72c437ff97c3237c5126572e276f98 /drivers/infiniband | |
| parent | 5c5f3f0a74740c8f7bca8255741291bb0d2ebe4b (diff) | |
| download | linux-73c40c616a33fcb7961b3c90a91b550813129b3e.tar.gz linux-73c40c616a33fcb7961b3c90a91b550813129b3e.tar.bz2 linux-73c40c616a33fcb7961b3c90a91b550813129b3e.zip | |
IB/core: Add locking around event dispatching on XRC target QPs
Fix a potential race when event occurrs on a target XRC QP and in the
middle of reporting that on its shared qps, one of them is destroyed
by user space application. Also add note for kernel consumers in
ib_verbs.h that they must not destroy the QP from within the handler.
Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/core/verbs.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 22192deb8828..077fd641b300 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -346,10 +346,13 @@ EXPORT_SYMBOL(ib_destroy_srq); static void __ib_shared_qp_event_handler(struct ib_event *event, void *context) { struct ib_qp *qp = context; + unsigned long flags; + spin_lock_irqsave(&qp->device->event_handler_lock, flags); list_for_each_entry(event->element.qp, &qp->open_list, open_list) if (event->element.qp->event_handler) event->element.qp->event_handler(event, event->element.qp->qp_context); + spin_unlock_irqrestore(&qp->device->event_handler_lock, flags); } static void __ib_insert_xrcd_qp(struct ib_xrcd *xrcd, struct ib_qp *qp) |