linux-kernel - Re: [PATCH 13/55] staging: wfx: avoid double warning when no more tx policy are available

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Message-ID: <2726644.RsKqsKUrSp@pc-42>
Date:   Fri, 3 Jan 2020 10:39:16 +0000
From:   Jérôme Pouiller <Jerome.Pouiller@...abs.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
CC:     "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "David S . Miller" <davem@...emloft.net>,
        Kalle Valo <kvalo@...eaurora.org>
Subject: Re: [PATCH 13/55] staging: wfx: avoid double warning when no more tx
 policy are available

On Friday 3 January 2020 10:21:16 CET Dan Carpenter wrote:
> On Mon, Dec 16, 2019 at 05:03:40PM +0000, Jérôme Pouiller wrote:
> > From: Jérôme Pouiller <jerome.pouiller@...abs.com>
> >
> > Currently, number of available tx retry policies is checked two times.
> > Only one is sufficient.
> >
> > Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
> > ---
> >  drivers/staging/wfx/data_tx.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/staging/wfx/data_tx.c b/drivers/staging/wfx/data_tx.c
> > index 32e269becd75..c9dea627661f 100644
> > --- a/drivers/staging/wfx/data_tx.c
> > +++ b/drivers/staging/wfx/data_tx.c
> > @@ -169,7 +169,8 @@ static int wfx_tx_policy_get(struct wfx_vif *wvif,
> >       wfx_tx_policy_build(wvif, &wanted, rates);
> >
> >       spin_lock_bh(&cache->lock);
> > -     if (WARN_ON(list_empty(&cache->free))) {
> > +     if (list_empty(&cache->free)) {
> > +             WARN(1, "unable to get a valid Tx policy");
> >               spin_unlock_bh(&cache->lock);
> >               return WFX_INVALID_RATE_ID;
> 
> This warning is more clear than the original which is good, but that's
> not what the commit message says.  How does this fix a double warning?

Err... Indeed, it don't. From wfx_tx_get_rate_id():

       rate_id = wfx_tx_policy_get(wvif, ...);
       if (rate_id == WFX_INVALID_RATE_ID)
               dev_warn(wvif->wdev->dev, "unable to get a valid Tx policy");

I will fix that in my next PR.

-- 
Jérôme Pouiller