Re: [PATCH 1/2] mt76: mt7915: fix unused 'mode' variable

[Kalle Valo]

Arnd Bergmann <arnd@xxxxxxxxxx> wrote:

> From: Arnd Bergmann <arnd@xxxxxxxx>
> 
> clang points out a possible corner case in the mt7915_tm_set_tx_cont()
> function if called with invalid arguments:
> 
> drivers/net/wireless/mediatek/mt76/mt7915/testmode.c:593:2: warning: variable 'mode' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized]
>         default:
>         ^~~~~~~
> drivers/net/wireless/mediatek/mt76/mt7915/testmode.c:597:13: note: uninitialized use occurs here
>         rateval =  mode << 6 | rate_idx;
>                    ^~~~
> drivers/net/wireless/mediatek/mt76/mt7915/testmode.c:506:37: note: initialize the variable 'mode' to silence this warning
>         u8 rate_idx = td->tx_rate_idx, mode;
>                                            ^
> 
> Change it to return an error instead of continuing with invalid data
> here.
> 
> Fixes: 3f0caa3cbf94 ("mt76: mt7915: add support for continuous tx in testmode")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

Please remove the break and send v2.

Patch set to Changes Requested.

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20210225145953.404859-1-arnd@xxxxxxxxxx/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches