linux-kernel - Re: [PATCH] staging: media: lirc: lirc_zilog.c: adjust debug messages

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Date:	Tue, 4 Nov 2014 02:17:19 +0200
From:	Aya Mahfouz <mahfouz.saif.elyazal@...il.com>
To:	Konrad Zapalowicz <bergo.torino@...il.com>
Cc:	Jarod Wilson <jarod@...sonet.com>,
	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Tuomas Tynkkynen <tuomas.tynkkynen@....fi>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Gulsah Kose <gulsah.1004@...il.com>,
	Matina Maria Trompouki <mtrompou@...il.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org
Subject: Re: [PATCH] staging: media: lirc: lirc_zilog.c: adjust debug messages

On Sun, Nov 02, 2014 at 12:40:13PM +0100, Konrad Zapalowicz wrote:
> On 11/01, Aya Mahfouz wrote:
> > This patch removes one debug message and replaces a dev_err
> > call by pr_err.
> 
> Usually you would like to send this as two separate patches because
> replacing a debug message is way different than removing some code. It
> should look like:
> 
> 	PATCH 0/2 staging: media: adjust debug messages
> 		PATCH 1/2 staging: media: replace dev_err...
> 		PATCH 2/2 staging: media: remove debug message..
> 
> The lirc_zilog.c is not necessary in the topic line, as this can be seen
> from the diff.
> 

Thanks Konrad for your pieces of advice.

Kind Regards,
Aya Saif El-yazal Mahfouz

> > Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal@...il.com>
> > ---
> >  drivers/staging/media/lirc/lirc_zilog.c | 7 +------
> >  1 file changed, 1 insertion(+), 6 deletions(-)
> > 
> > diff --git a/drivers/staging/media/lirc/lirc_zilog.c b/drivers/staging/media/lirc/lirc_zilog.c
> > index 11a7cb1..ba538cd4 100644
> > --- a/drivers/staging/media/lirc/lirc_zilog.c
> > +++ b/drivers/staging/media/lirc/lirc_zilog.c
> > @@ -1336,11 +1336,6 @@ static int close(struct inode *node, struct file *filep)
> >  	/* find our IR struct */
> >  	struct IR *ir = filep->private_data;
> >  
> > -	if (ir == NULL) {
> > -		dev_err(ir->l.dev, "close: no private_data attached to the file!\n");
> > -		return -ENODEV;
> > -	}
> > -
> 
> What is the reason behind this change? What would happen if the
> filep->private_data is NULL? Are the callers of this function aware that
> it will not return ENODEV anymore?
> 
> thanks,
> konrad
> 
> >  	atomic_dec(&ir->open_count);
> >  
> >  	put_ir_device(ir, false);
> > @@ -1633,7 +1628,7 @@ out_put_xx:
> >  out_put_ir:
> >  	put_ir_device(ir, true);
> >  out_no_ir:
> > -	dev_err(ir->l.dev, "%s: probing IR %s on %s (i2c-%d) failed with %d\n",
> > +	pr_err("%s: probing IR %s on %s (i2c-%d) failed with %d\n",
> >  		    __func__, tx_probe ? "Tx" : "Rx", adap->name, adap->nr,
> >  		   ret);
> >  	mutex_unlock(&ir_devices_lock);
> > -- 
> > 1.9.3
> > 
> > _______________________________________________
> > devel mailing list
> > devel@...uxdriverproject.org
> > http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
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