[PATCH v2] mt7601u: check memory allocation failure

[Jakub Kicinski]

On Tue, 22 Aug 2017 00:06:17 +0200, Christophe JAILLET wrote:
> Check memory allocation failure and return -ENOMEM in such a case, as
> already done a few lines below.
> 
> As 'dev->tx_q' can be NULL, we also need to check for that in
> 'mt7601u_free_tx()', and return early.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet at wanadoo.fr>

Acked-by: Jakub Kicinski <kubakici at wp.pl>