linux-kernel - Re: [PATCH] mmc: atmel-mci: simplify if-if to if-else

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Message-ID: <YmgKa4xQ+pOd2xfh@myhostname>
Date:   Tue, 26 Apr 2022 23:06:19 +0800
From:   Wan Jiabing <wanjiabing@...o.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>,
        linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kael_w@...h.net
Subject: Re: [PATCH] mmc: atmel-mci: simplify if-if to if-else

On Tue, Apr 26, 2022 at 03:53:09PM +0200, Ulf Hansson wrote:
> On Sun, 24 Apr 2022 at 11:04, Wan Jiabing <wanjiabing@...o.com> wrote:
> >
> > Use if and else instead of if(A) and if (!A).
> >
> > Signed-off-by: Wan Jiabing <wanjiabing@...o.com>
> > ---
> >  drivers/mmc/host/atmel-mci.c | 3 +--
> >  1 file changed, 1 insertion(+), 2 deletions(-)
> >
> > diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> > index 807177c953f3..98893ccad4bd 100644
> > --- a/drivers/mmc/host/atmel-mci.c
> > +++ b/drivers/mmc/host/atmel-mci.c
> > @@ -1125,8 +1125,7 @@ atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data)
> >         chan = host->dma.chan;
> >         if (chan)
> >                 host->data_chan = chan;
> > -
> > -       if (!chan)
> > +       else
> >                 return -ENODEV;
> 
> To make a slightly better improvement of the code, I suggest we add an
> early bail out point in the atmci_prepare_data_dma() function. Like
> below:
> 
> if (!host->dma.chan)
>      return -ENODEV;
> 
> [...]
> 
> Kind regards
> Uffe

OK

How about this new patch?

Thanks,
Wan Jiabing


View attachment "0001-mmc-atmel-mci-Simplify-if-chan-and-if-chan.patch" of type "text/plain" (1105 bytes)