Btw, if you have the cross function DB built then Smatch says that the NULL check can be removed here no problem. $ smdb hostif_data_request [ snip ] drivers/staging/ks7010/ks_wlan_net.c | ks_wlan_start_xmit | hostif_data_request | PARAM_VALUE | 1 | skb | s64min-(-1),1-s64max regards, dan carpenter _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel