sfc: Add check for memory allocation failure in falcon_probe_nic()

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/sfc/falcon.c

@@ -2758,6 +2758,8 @@ int falcon_probe_nic(struct efx_nic *efx)
 
 	/* Allocate storage for hardware specific data */
 	nic_data = kzalloc(sizeof(*nic_data), GFP_KERNEL);
+	if (!nic_data)
+		return -ENOMEM;
 	efx->nic_data = nic_data;
 
 	/* Determine number of ports etc. */