netdev - Re: [PATCH] wifi: wfx: Remove some dead code

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Date:   Tue, 21 Feb 2023 18:02:27 +0100
From:   Jérôme Pouiller <jerome.pouiller@...abs.com>
To:     Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     kernel-janitors@...r.kernel.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH] wifi: wfx: Remove some dead code

On Friday 17 February 2023 20:51:24 CET Christophe JAILLET wrote:
> Le 15/02/2023 à 14:23, Jérôme Pouiller a écrit :
> > On Wednesday 15 February 2023 13:34:37 CET Christophe JAILLET wrote:
> >>
> >> wait_for_completion_timeout() can not return a <0 value.
> >> So simplify the logic and remove dead code.
> >>
> >> -ERESTARTSYS can not be returned by do_wait_for_common() for tasks with
> >> TASK_UNINTERRUPTIBLE, which is the case for wait_for_completion_timeout()
> >>
> >> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> >> ---
> >>   drivers/net/wireless/silabs/wfx/main.c | 10 +++-------
> >>   1 file changed, 3 insertions(+), 7 deletions(-)
> >>
> >> diff --git a/drivers/net/wireless/silabs/wfx/main.c b/drivers/net/wireless/silabs/wfx/main.c
> >> index 6b9864e478ac..0b50f7058bbb 100644
> >> --- a/drivers/net/wireless/silabs/wfx/main.c
> >> +++ b/drivers/net/wireless/silabs/wfx/main.c
> >> @@ -358,13 +358,9 @@ int wfx_probe(struct wfx_dev *wdev)
> >>
> >>          wfx_bh_poll_irq(wdev);
> >>          err = wait_for_completion_timeout(&wdev->firmware_ready, 1 * HZ);
> >> -       if (err <= 0) {
> >> -               if (err == 0) {
> >> -                       dev_err(wdev->dev, "timeout while waiting for startup indication\n");
> >> -                       err = -ETIMEDOUT;
> >> -               } else if (err == -ERESTARTSYS) {
> >> -                       dev_info(wdev->dev, "probe interrupted by user\n");
> >
> > This code is ran during modprobe/insmod. We would like to allow the user
> > to interrupt (Ctrl+C) the probing if something is going wrong with the
> > device.
> >
> > So, the real issue is wait_for_completion_interruptible_timeout() should
> > be used instead of wait_for_completion_timeout().
> 
> Hmmm, not that clear.
> 
> See commit 01088cd143a9.
> 
> Let me know if you prefer this patch as-is or if 01088cd143a9 should be
> reverted.

Good catch. So this patch is correct.

Reviewed-by: Jérôme Pouiller <jerome.pouiller@...abs.com>


-- 
Jérôme Pouiller