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RDMA/ucma: Add missing locking around rdma_leave_multicast()
author
Jason Gunthorpe
<jgg@nvidia.com>
Tue, 18 Aug 2020 12:05:22 +0000
(15:05 +0300)
committer
Jason Gunthorpe
<jgg@nvidia.com>
Thu, 27 Aug 2020 11:38:15 +0000
(08:38 -0300)
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>
drivers/infiniband/core/ucma.c
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diff --git
a/drivers/infiniband/core/ucma.c
b/drivers/infiniband/core/ucma.c
index ca5c44cac48c0e19d92b6647c693d320aa9237d6..ad78b05de656c9d52d3357e11cce967e8f1888fb 100644
(file)
--- a/
drivers/infiniband/core/ucma.c
+++ b/
drivers/infiniband/core/ucma.c
@@
-1535,7
+1535,9
@@
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);