linux-kernel - Re: [PATCH RESEND] clk-si5341: replace snprintf in show functions with sysfs

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Date:   Fri, 14 Jan 2022 05:06:07 +0000
From:   Robert Hancock <robert.hancock@...ian.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "wangqing@...o.com" <wangqing@...o.com>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>
CC:     "mike.looijmans@...ic.nl" <mike.looijmans@...ic.nl>
Subject: Re: [PATCH RESEND] clk-si5341: replace snprintf in show functions
 with sysfs_emit

On Thu, 2022-01-13 at 18:44 -0800, Stephen Boyd wrote:
> +Robert
> 
> Quoting Qing Wang (2021-10-14 23:45:28)
> > coccicheck complains about the use of snprintf() in sysfs show functions.
> > 
> > Fix the following coccicheck warning:
> > drivers/clk/clk-si5341.c:1471: WARNING: use scnprintf or sprintf.
> > drivers/clk/clk-si5341.c:1486: WARNING: use scnprintf or sprintf.
> > drivers/clk/clk-si5341.c:1501: WARNING: use scnprintf or sprintf.
> > drivers/clk/clk-si5341.c:1516: WARNING: use scnprintf or sprintf.
> > 
> > Use sysfs_emit instead of scnprintf or sprintf makes more sense.
> > 
> > Signed-off-by: Qing Wang <wangqing@...o.com>
> > ---
> >  drivers/clk/clk-si5341.c | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/clk/clk-si5341.c b/drivers/clk/clk-si5341.c
> > index 57ae183..5d62ddb 100644
> > --- a/drivers/clk/clk-si5341.c
> > +++ b/drivers/clk/clk-si5341.c
> > @@ -1468,7 +1468,7 @@ static ssize_t input_present_show(struct device *dev,
> >         if (res < 0)
> >                 return res;
> >         res = !(status & SI5341_STATUS_LOSREF);
> > -       return snprintf(buf, PAGE_SIZE, "%d\n", res);
> > +       return sysfs_emit(buf, "%d\n", res);
> >  }
> >  static DEVICE_ATTR_RO(input_present);
> >  
> > @@ -1483,7 +1483,7 @@ static ssize_t input_present_sticky_show(struct
> > device *dev,
> >         if (res < 0)
> >                 return res;
> >         res = !(status & SI5341_STATUS_LOSREF);
> > -       return snprintf(buf, PAGE_SIZE, "%d\n", res);
> > +       return sysfs_emit(buf, "%d\n", res);
> >  }
> >  static DEVICE_ATTR_RO(input_present_sticky);
> >  
> > @@ -1498,7 +1498,7 @@ static ssize_t pll_locked_show(struct device *dev,
> >         if (res < 0)
> >                 return res;
> >         res = !(status & SI5341_STATUS_LOL);
> > -       return snprintf(buf, PAGE_SIZE, "%d\n", res);
> > +       return sysfs_emit(buf, "%d\n", res);
> >  }
> >  static DEVICE_ATTR_RO(pll_locked);
> >  
> > @@ -1513,7 +1513,7 @@ static ssize_t pll_locked_sticky_show(struct device
> > *dev,
> >         if (res < 0)
> >                 return res;
> >         res = !(status & SI5341_STATUS_LOL);
> > -       return snprintf(buf, PAGE_SIZE, "%d\n", res);
> > +       return sysfs_emit(buf, "%d\n", res);
> >  }
> >  static DEVICE_ATTR_RO(pll_locked_sticky);

Looks good to me.

Reviewed-by: Robert Hancock <robert.hancock@...ian.com>

> >  
> > -- 
> > 2.7.4
> > 
-- 
Robert Hancock
Senior Hardware Designer, Calian Advanced Technologies
www.calian.com