linux-kernel - Re: [PATCH 1/2] Staging: vme: remove unreachable code

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Date:	Wed, 23 Feb 2011 15:09:56 +0000
From:	Martyn Welch <martyn.welch@...com>
To:	Dan Carpenter <error27@...il.com>,
	Manohar Vanga <manohar.vanga@...n.ch>,
	devel@...verdev.osuosl.org, cota@...ap.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] Staging: vme: remove unreachable code

On 23/02/11 12:17, Dan Carpenter wrote:
> On Wed, Feb 23, 2011 at 09:19:06AM +0000, Martyn Welch wrote:
>> On 22/02/11 19:36, Manohar Vanga wrote:
>>> Remove unreachable code from vme_register_bridge
>>>
>>> Signed-off-by: Manohar Vanga <manohar.vanga@...n.ch>
> 
> Please always CC the list.  It's going to be Greg to commit this
> code so CC Greg as well.
> 
> ./scripts/get_maintainer.pl patch.diff
> 
> (Although you should generally remove Tejun from the CC list.)
> 
>>
>> Yeah - that's there from development. If the function needed to be extended,
>> that's the next part of the error path.
> 
> Don't do that.  Kernel style is austere.  Anything that isn't needed
> here and now should be removed.
> 
>>> --- a/drivers/staging/vme/vme.c
>>> +++ b/drivers/staging/vme/vme.c
>>> @@ -1363,7 +1363,6 @@ int vme_register_bridge(struct vme_bridge *bridge)
>>>  
>>>  	return retval;
>>>  
>>> -	i = VME_SLOTS_MAX;
>>>  err_reg:
>>>  	while (i > -1) {
>>>  		dev = &bridge->dev[i];
> 
> There are two problems with this loop.  1) It unregisters the device
> which failed to register.  2) It is a forever loop.
> 

Even if "i" is a signed int?

> It should be:
> 	while (--i >= 0) {
> 		dev = &bridge->dev[i];
> 
> Can you fix that up as well and resend.
> 
> regards,
> dan carpenter


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