Re: [PATCH] nvme: Ensure ret is always initialized in

[Jens Axboe]

On 5/6/22 9:03 AM, Nathan Chancellor wrote:
> Clang warns:
> 
>   drivers/nvme/host/ioctl.c:674:6: error: variable 'ret' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
>           if (ns)
>               ^~
>   drivers/nvme/host/ioctl.c:677:9: note: uninitialized use occurs here
>           return ret;
>                  ^~~
>   drivers/nvme/host/ioctl.c:674:2: note: remove the 'if' if its condition is always true
>           if (ns)
>           ^~~~~~~
>   drivers/nvme/host/ioctl.c:672:9: note: initialize the variable 'ret' to silence this warning
>           int ret;
>                  ^
>                   = 0
>   1 error generated.
> 
> Initialize ret to zero so that it cannot be used uninitialized.

Thanks, will fold this in.

> Or alternatively, remove the 'if (ns)' if ns can never be NULL; I tried
> going down the rabbit hole to see if that is possible but I got a little
> lost :^)

For the admin queue, ns can be NULL.

-- 
Jens Axboe