linux-kernel - Re: [PATCH 1/9] remoteproc: core: Ensure error message is clear

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Date:	Thu, 11 Aug 2016 12:19:11 -0700
From:	Bjorn Andersson <bjorn.andersson@...aro.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Suman Anna <s-anna@...com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kernel@...inux.com" <kernel@...inux.com>,
	"patrice.chotard@...com" <patrice.chotard@...com>,
	"ohad@...ery.com" <ohad@...ery.com>,
	"linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
	"loic.pallardy@...com" <loic.pallardy@...com>
Subject: Re: [PATCH 1/9] remoteproc: core: Ensure error message is clear

On Thu 11 Aug 00:36 PDT 2016, Lee Jones wrote:

> On Wed, 10 Aug 2016, Suman Anna wrote:
> 
> > On 08/09/2016 01:12 PM, Lee Jones wrote:
> > > On Tue, 09 Aug 2016, Bjorn Andersson wrote:
> > > 
> > >> On Thu 04 Aug 02:21 PDT 2016, Lee Jones wrote:
[..]
> > >>> -	dev_dbg(dev, "carveout rsc: da %x, pa %x, len %x, flags %x\n",
> > >>> +	dev_dbg(dev, "carveout rsc: da %x, pa %x, len 0x%x, flags %x\n",
> > >>>  			rsc->da, rsc->pa, rsc->len, rsc->flags);
> > 
> > If you are modifying this trace, it's better to following the leading 0x
> > convention on all arguments rather than just the length.
> 
> I'd be concerned if anyone thought it a good idea to print out memory
> addresses !0x.  The length is the only parameter there which could
> (and has) cause confusion.
> 
> However, the fix-up is trivial, so I'm happy to oblige.  I'll leave
> the final decision to Bjorn and fix-up if he sees it necessary.
> 

I applied this patch yesterday, I see both changes here related to the
issue presented (confusing printing of len) so I'm fine with not
touching the other parts.

That said, there are a few other format strings in this driver that
would benefit from some love as well, several cases where we should use
%pK or %pad rather than using %llx and a cast to unsigned long long.

Regards,
Bjorn