[PATCH] staging: Check for Null return of allocated skb in fw_download_code

[philipp.muhoray@gmail.com (Philipp Muhoray)]

Am 2014-08-13 20:03, schrieb Nick Krause:
> On Wed, Aug 13, 2014 at 12:55 PM, Nick Krause <xerofoify@gmail.com> wrote:
>> On Wed, Aug 13, 2014 at 12:02 PM,  <Valdis.Kletnieks@vt.edu> wrote:
>>> On Wed, 13 Aug 2014 18:50:43 +0400, Max Filippov said:
>>>
>>>> No need to trigger it, faking it would be enough, e.g.:
>>>> +                if (++i < 3)
>>>> +                        skb  = dev_alloc_skb(frag_length + 4);
>>>> +                else
>>>> +                        skb = NULL;
>>> Don't bet on this triggering on a real system without some additional
>>> scaffolding - take a look at what the function is doing, and ask yourself
>>> how many times it will be called on the average system :)
>> Seems to be called a lot. In addition I can only build test this as I
>> don't have the hardware.
>> Cheers Nick
>
> I did test my patch by doing a kernel build and I get this error,
> drivers/staging/rtl8192e/rtl8192e/r8192E_firmware.c:66:4: error:
> implicit declaration of function 'skb_quene_purge'
> [-Werror=implicit-function-declaration]
>      skb_quene_purge(&priv->rtllib->skb_waitQ[tcb_desc->queue_index]);
> I am wondering how do I fix this, I will attach my patch so I can fix
> this out and send a proper patch :).
> By the way thanks for the help guys :).
> Nick
>
>
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This error indicates that you are using a function that is not yet known 
to the compiler. Check if there's a prototype or function definition 
BEFORE it's actual use.

br,
phil
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