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RDMA/ucma: Add missing locking around rdma_leave_multicast() 

[ Upstream commit 38e03d092699891c3237b5aee9e8029d4ede0956 ]

All entry points to the rdma_cm from a ULP must be single threaded,
even this error unwinds. Add the missing locking.

Fixes: 7c11910783a1 ("RDMA/ucma: Put a lock around every call to the rdma_cm layer")
Link: https://lore.kernel.org/r/20200818120526.702120-11-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jason Gunthorpe 2020-08-18 15:05:22 +03:00 committed by Greg Kroah-Hartman
parent cc8ebd76b1
commit 1564884a41
1 changed files with 2 additions and 0 deletions
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2
drivers/infiniband/core/ucma.c
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@ -1473,7 +1473,9 @@ static ssize_t ucma_process_join(struct ucma_file *file,
return 0;
err3:
mutex_lock(&ctx->mutex);
rdma_leave_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr);
mutex_unlock(&ctx->mutex);
ucma_cleanup_mc_events(mc);
err2:
xa_erase(&multicast_table, mc->id);