IB/cm: Release previously acquired reference counter in the cm_id_priv

commit b856101a1774b5f1c8c99e8dfdef802856520732 upstream.

In failure flow, the reference counter acquired was not released,
and the following error was reported:

  drivers/infiniband/core/cm.c:3373 cm_lap_handler() warn: inconsistent
			refcounting 'cm_id_priv->refcount.refs.counter':

Fixes: 7345201c3963 ("IB/cm: Improve the calling of cm_init_av_for_lap and cm_init_av_by_path")
Link: https://lore.kernel.org/r/7615f23bbb5c5b66d03f6fa13e1c99d51dae6916.1642581448.git.leonro@nvidia.com
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index c903b74..35f0d5e 100644 (file)
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -3322,7 +3322,7 @@ static int cm_lap_handler(struct cm_work *work)
        ret = cm_init_av_by_path(param->alternate_path, NULL, &alt_av);
        if (ret) {
                rdma_destroy_ah_attr(&ah_attr);
-               return -EINVAL;
+               goto deref;
        }
 
        spin_lock_irq(&cm_id_priv->lock);