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| author | Michael S. Tsirkin <mst@mellanox.co.il> | 2006-11-29 15:33:10 -0800 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-11-29 15:33:10 -0800 |
| commit | f469b2626f48829c06e40ac799c1edf62b12048e (patch) | |
| tree | 425a3a94af73ed41c7eb28a0ad50d411bc545663 /drivers | |
| parent | e1444b5a163e81138754cab27c4fa1637b5a2239 (diff) | |
| download | op-kernel-dev-f469b2626f48829c06e40ac799c1edf62b12048e.zip op-kernel-dev-f469b2626f48829c06e40ac799c1edf62b12048e.tar.gz | |
IB/ucm: Fix deadlock in cleanup
ib_ucm_cleanup_events() holds file_mutex while calling ib_destroy_cm_id().
This can deadlock since ib_destroy_cm_id() flushes event handlers, and
ib_ucm_event_handler() needs file_mutex, too. Therefore, drop the
file_mutex during the call to ib_destroy_cm_id().
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/core/ucm.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c index 1f4f2d2..f15220a 100644 --- a/drivers/infiniband/core/ucm.c +++ b/drivers/infiniband/core/ucm.c @@ -161,12 +161,14 @@ static void ib_ucm_cleanup_events(struct ib_ucm_context *ctx) struct ib_ucm_event, ctx_list); list_del(&uevent->file_list); list_del(&uevent->ctx_list); + mutex_unlock(&ctx->file->file_mutex); /* clear incoming connections. */ if (ib_ucm_new_cm_id(uevent->resp.event)) ib_destroy_cm_id(uevent->cm_id); kfree(uevent); + mutex_lock(&ctx->file->file_mutex); } mutex_unlock(&ctx->file->file_mutex); } |
