linux-kernel - Re: [PATCH] staging: dgap: fix returned errno code in dgap

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Message-ID: <20150922045238.GA5526@sudip-pc>
Date:	Tue, 22 Sep 2015 10:22:38 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Javier Martinez Canillas <javier@....samsung.com>
Cc:	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Daeseok Youn <daeseok.youn@...il.com>,
	driverdev-devel@...uxdriverproject.org,
	Lidza Louina <lidza.louina@...il.com>
Subject: Re: [PATCH] staging: dgap: fix returned errno code in
 dgap_parsefile()

On Tue, Sep 22, 2015 at 02:39:36AM +0200, Javier Martinez Canillas wrote:
> The driver is using -1 instead of the -ENOMEM defined macro to specify
> that a buffer allocation failed. Since the error number is propagated,
> the caller will get a -EPERM which is the wrong error condition.
Just a little doubt. caller means the function which is calling this
dgap_parsefile() or you meant the user?
The function which is calling this dgap_parsefile() is just checking if
it has received 0 or something else. Something else is error and it
rerturns -EINVAL for all types of error (ofcourse that is also wrong).
So the user will see -EINVAL for all types of error in dgap_parsefile().

regards
sudip
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