[PATCH 1/1] net: ehea: avoid null pointer dereference

[Heinrich Schuchardt]

ehea_get_port may return NULL. Do not dereference NULL value.

Fixes: 8c4877a4128e ("ehea: Use the standard logging functions")
Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
 drivers/net/ethernet/ibm/ehea/ehea_main.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c 
b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 2a0dc12..54efa9a 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -1169,16 +1169,15 @@ static void ehea_parse_eqe(struct ehea_adapter 
*adapter, u64 eqe)
        ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe);
        portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe);
        port = ehea_get_port(adapter, portnum);
+       if (!port) {
+               netdev_err(NULL, "unknown portnum %x\n", portnum);
+               return;
+       }
        dev = port->netdev;
 
        switch (ec) {
        case EHEA_EC_PORTSTATE_CHG:     /* port state change */
 
-               if (!port) {
-                       netdev_err(dev, "unknown portnum %x\n", portnum);
-                       break;
-               }
-
                if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) {
                        if (!netif_carrier_ok(dev)) {
                                ret = ehea_sense_port_attr(port);
-- 
2.1.4