Re: [PATCH] wext: handle NULL exta data in iwe_stream_add_point better

On Wed, 2017-01-11 at 15:35 +0100, Arnd Bergmann wrote:

gcc-7 complains that wl3501_cs passes NULL into a function that
then uses the argument as the input for memcpy:

drivers/net/wireless/wl3501_cs.c: In function 'wl3501_get_scan':
include/net/iw_handler.h:559:3: error: argument 2 null where non-null 
expected [-Werror=nonnull]
   memcpy(stream + point_len, extra, iwe->u.data.length);

I love wext ;-)

This works fine here because iwe->u.data.length is guaranteed to be
NULL, and the memcpy doesn't actually have an effect.

I think you mean 0, not NULL, but I can fix that when I apply it.

johannes