linux-kernel - Re: [PATCH] staging: panel: remove duplicate code

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Message-ID: <20150407084930.GD10964@mwanda>
Date:	Tue, 7 Apr 2015 11:49:30 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	Willy Tarreau <willy@...a-x.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: panel: remove duplicate code

On Tue, Apr 07, 2015 at 01:55:01PM +0530, Sudip Mukherjee wrote:
> both the misc_deregister(), parport_release() and
> parport_unregister_device() is there in the module_exit function also.
> detach is called from parport_unregister_driver() and by the time
> detach executes misc_deregister(), parport_release() and
> parport_unregister_device() has already executed marking
> keypad_initialized and lcd.initialized  as false. so this part of the
> code will never execute.
> 
> Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>

Reviewed-by: Dan Carpenter <dan.carpenter@...cle.com>

A better subject might have been "remove dead code" but that was
explained pretty well in the patch desription.

I hadn't looked at this driver much before.  It sucks that
parport_driver ->attach() functions can't fail...  I think we don't
need the "keypad_initialized" and "lcd.initialized" variables because
"if (pprt)" is enough to tell us whether or not the attach function
succeeded.

TODO: Staging: panel: remove some redundent variables.

regards,
dan carpenter

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