linux-kernel - Re: [PATCH 6/6] r8152: Convert from tasklet to BH workqueue

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Message-ID: <Zd9yNByiBMcPxWbU@slm.duckdns.org>
Date: Wed, 28 Feb 2024 07:49:40 -1000
From: Tejun Heo <tj@...nel.org>
To: Allen <allen.lkml@...il.com>
Cc: jiangshanlai@...il.com, torvalds@...ux-foundation.org,
	linux-kernel@...r.kernel.org, kernel-team@...a.com,
	boqun.feng@...il.com, tglx@...utronix.de, peterz@...radead.org,
	romain.perier@...il.com, mingo@...nel.org
Subject: Re: [PATCH 6/6] r8152: Convert from tasklet to BH workqueue

Hello,

On Wed, Feb 28, 2024 at 09:33:40AM -0800, Allen wrote:
> > @@ -6971,7 +6972,7 @@ static int rtl8152_open(struct net_device *netdev)
> >                 goto out_unlock;
> >         }
> >         napi_enable(&tp->napi);
> > -       tasklet_enable(&tp->tx_tl);
> > +       enable_work(&tp->tx_work);
> 
>   I think we are missing queue_work() above, right?
> 
>    To avoid such situations, could we combine enable_work() + queue_work(),
> into a single API?

Here, the device is newly being opened and the work item is just disabled
from the init. So, it doesn't need queueing.

> Perhaps, something like:
> 
> static inline bool enable_and_queue_work(struct workqueue_struct *wq,
> struct work_struct *work)
> {
>        if (enable_work(work))
>        {
>              queue_work(wq, work);
>              return true;
>        }
>        return false;
> }

That said, this may still be nice to have.

Thanks.

-- 
tejun