linux-kernel - Re: [PATCH v2 1/7] media: uvcvideo: Use pr

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Date:   Wed, 04 Nov 2020 15:59:10 -0800
From:   Joe Perches <joe@...ches.com>
To:     Ricardo Ribalda <ribalda@...omium.org>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/7] media: uvcvideo: Use pr_cont() macro

On Thu, 2020-11-05 at 00:01 +0100, Ricardo Ribalda wrote:
> Hi Joe
> 
> On Thu, Nov 5, 2020 at 12:00 AM Joe Perches <joe@...ches.com> wrote:
> > 
> > On Wed, 2020-11-04 at 23:31 +0100, Ricardo Ribalda wrote:
> > 
> > > I have updated my tree with the dev_ variants
> > > 
> > > https://github.com/ribalda/linux/commit/b8785fd8efb4f2e5bbf5d0f2df3e0d69a5439015
> > 
> > I looked at this link and was confused so you made me look.
> > I think you meant:
> > 
> > https://github.com/ribalda/linux/commit/83cb6eb3a9f7bd1954acbfb4fb3d56ddf54bce73
> 
> Yes, thanks :) Sorry about that
> 
> This is why I should be away from a keyboard after 23:00 :)

Sleep is good.
There are lots of sleep deprived people here in the US today though.

It looks as if all the pr_cont uses in the code are odd and repetitive.

Perhaps it'd be sensible to add something like:

#define uvc_trace_cont(flag, fmt, ...)					\
do {									\
	if (uvc_trace_param & (flag))					\
		pr_cont(fmt, ##__VA_ARGS__);				\
} while (0)

and change all the uses like:

-               if (uvc_trace_param & UVC_TRACE_PROBE)
-                       printk(KERN_CONT " <- SU %d", entity->id);
+               uvc_trace_cont(UVC_TRACE_PROBE, " <- SU %d", entity->id);