[PATCH net 4/9] net/smc: adjust net_device refcount

[Ursula Braun]

smc_pnet_fill_entry() uses dev_get_by_name() adding a refcount to ndev.
The following smc_pnet_enter() has to reduce the refcount if the entry
to be added exists already in the pnet table.

Signed-off-by: Ursula Braun <ubr...@linux.vnet.ibm.com>
---
 net/smc/smc_pnet.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/smc/smc_pnet.c b/net/smc/smc_pnet.c
index 78f7af28ae4f..31f8453c25c5 100644
--- a/net/smc/smc_pnet.c
+++ b/net/smc/smc_pnet.c
@@ -181,8 +181,10 @@ static int smc_pnet_enter(struct smc_pnetentry 
*new_pnetelem)
                             sizeof(new_pnetelem->ndev->name)) ||
                    smc_pnet_same_ibname(pnetelem,
                                         new_pnetelem->smcibdev->ibdev->name,
-                                        new_pnetelem->ib_port))
+                                        new_pnetelem->ib_port)) {
+                       dev_put(pnetelem->ndev);
                        goto found;
+               }
        }
        list_add_tail(&new_pnetelem->list, &smc_pnettable.pnetlist);
        rc = 0;
-- 
2.13.5