linux-kernel - Re: [PATCH] pwm: Remove a redundant error message when devm_request_and

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Date:	Fri, 03 Aug 2012 09:37:56 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Axel Lin <axel.lin@...il.com>
CC:	Thierry Reding <thierry.reding@...onic-design.de>,
	linux-kernel@...r.kernel.org, Philip Avinash <avinashphilip@...com>
Subject: Re: [PATCH] pwm: Remove a redundant error message when devm_request_and_ioremap
 fails

On 08/03/2012 07:43 AM, Axel Lin wrote:
> The implementation in devm_request_and_ioremap() already shows error message,
> so no need to show dev_err again if devm_request_and_ioremap() fails.

I don't have any issue with this patch, but a general comment:

It sure would be nice if there was some way to easily tell which
functions did already print an error message. In some drivers I've
written, I've made sure that every failure path prints an error message
so it's easy to track down failures. However, if some functions already
do this and some don't, only some call sites in the driver will have
error prints, so it'll look inconsistent, as if some error messages were
forgotten:-(
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