Re: [PATCH 2.6.15-rc5] media/video/bttv : enhance ioctl debug

[Philippe De Muyter]

Mauro Carvalho Chehab wrote :
> Em Qui, 2005-12-08 às 22:05 +0100, Philippe De Muyter escreveu:
> > This patch adds the current process name in the media/video/bttv ioctl debug.
> 
> 	Philippe, 
> 
> 	I'm in doubt about the relevance of this patch. Why do you think it is
> important to have process name at ioctl debug?

I needed to add that when testing my v4l2-compat patches with xawtv.  It took
me a long time to discover that some ioctls were issued by xawtv itself,
others by v4l-conf and others yet by the xvideo/v4l module of my Xserver.
With the process name in the ioctl debugging, I think that my tests and
development would have been much faster.

Philippe

> 
> 	PS.: Please address these patches to V4L Mailing List.
> > 
> > Signed-off-by: Philippe De Muyter <phdm@xxxxxxxxx>
> > 
> > ---
> > 
> > --- linux/drivers/media/video/bttv-driver.c.orig	2005-08-29 01:41:01.000000000 +0200
> > +++ linux/drivers/media/video/bttv-driver.c	2005-12-08 20:59:45.000000000 +0100
> > @@ -2181,19 +2182,19 @@ static int bttv_do_ioctl(struct inode *i
> >  	int retval = 0;
> >  
> >  	if (bttv_debug > 1) {
> > +		printk("bttv%d: %s: ioctl 0x%x ", btv->c.nr, current->comm,
> > +			cmd);
> >  		switch (_IOC_TYPE(cmd)) {
> >  		case 'v':
> > -			printk("bttv%d: ioctl 0x%x (v4l1, VIDIOC%s)\n",
> > -			       btv->c.nr, cmd, (_IOC_NR(cmd) < V4L1_IOCTLS) ?
> > +			printk("(v4l1, VIDIOC%s)\n",
> > +			       (_IOC_NR(cmd) < V4L1_IOCTLS) ?
> >  			       v4l1_ioctls[_IOC_NR(cmd)] : "???");
> >  			break;
> >  		case 'V':
> > -			printk("bttv%d: ioctl 0x%x (v4l2, %s)\n",
> > -			       btv->c.nr, cmd,  v4l2_ioctl_names[_IOC_NR(cmd)]);
> > +			printk("(v4l2, %s)\n", v4l2_ioctl_names[_IOC_NR(cmd)]);
> >  			break;
> >  		default:
> > -			printk("bttv%d: ioctl 0x%x (???)\n",
> > -			       btv->c.nr, cmd);
> > +			printk("(???)\n");
> >  		}
> >  	}
> >  	if (btv->errors)
> > -
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