On Wed, Oct 22, 2014 at 10:12 PM, David Miller <[email protected]> wrote:
> From: Geert Uytterhoeven <[email protected]>
> Date: Wed, 22 Oct 2014 21:50:06 +0200
>
>> On Wed, Oct 22, 2014 at 9:34 PM, David Miller <[email protected]> wrote:
>>> From: Geert Uytterhoeven <[email protected]>
>>> Date: Wed, 22 Oct 2014 09:39:41 +0200
>>>
>>>> drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c: In function
>>>> ‘xgene_enet_ecc_init’:
>>>> drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c:126: warning: ‘data’ may
>>>> be used uninitialized in this function
>>>>
>>>> Depending on the arbitrary value on the stack, the loop may terminate
>>>> too early, and cause a bogus -ENODEV failure.
>>>>
>>>> Signed-off-by: Geert Uytterhoeven <[email protected]>
>>>> ---
>>>> v2: Rewrite the loop instead of pre-initializing data.
>>>
>>> I hate to be a pest, but like the other patch of your's I think
>>> a do { } while() works best here because the intent is clearly
>>> to run the loop at least once, right?
>>
>> I wanted to avoid checking for "data != ~0U" twice: once to abort the loop,
>> and once to check if a timeout happened.
>
> Hmmm:
>
> do {
> usleep_range(...);
> data = ...();
> if (data == ~0)
> return 0;
> } while (++i < 10);
>
> netdev_err(...);
> return -ENODEV;
>
> Why would you have to check data twice?
--
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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