Re: [PATCH v5 2/3] blk-cgroup: Return -ENOMEM directly in blkcg_css_alloc() error path

[Waiman Long]

On 6/2/22 12:16, Tejun Heo wrote:
> On Thu, Jun 02, 2022 at 09:35:42AM -0400, Waiman Long wrote:
> > For blkcg_css_alloc(), the only error that will be returned is -ENOMEM.
> > Simplify error handling code by returning this error directly instead
> > of setting an intermediate "ret" variable.
> >
> > Signed-off-by: Waiman Long <longman@xxxxxxxxxx>
> Acked-by: Tejun Heo <tj@xxxxxxxxxx>
>
> But I don't understand why this would trigger warning. Can you please
> elaborate why this is needed.
>
> Thanks.

I forgot to set "ret" in my original patch 2 in case of allocation 
error. I didn't got a warning in my own build, maybe I didn't explicitly 
enable more warning. I could have modified the patch to set "ret" on 
error, but the "ret" setting looks duplicative to me and so I added this 
patch to get rid of it.

Thanks,
Longman