linux-kernel - Re: [PATCH] drivers/net/wireless/iwlwifi/iwl-3945.c

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Date:	Thu, 03 Jul 2008 09:51:52 +0800
From:	Zhu Yi <yi.zhu@...el.com>
To:	"John W. Linville" <linville@...driver.com>
Cc:	Darren Jenkins <darrenrjenkins@...il.com>,
	kernel Janitors <kernel-janitors@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	ipw2100-admin@...ux.intel.com, reinette.chatre@...el.com
Subject: Re: [PATCH]  drivers/net/wireless/iwlwifi/iwl-3945.c

On Wed, 2008-07-02 at 15:24 -0400, John W. Linville wrote:
> What about the format line in the IWL_DEBUG_RX that uses rate?
> 
> Also, please use an email subject that is more descriptive than just
> the filename.  You should probably drop the "G'day..." line as well.

Side with John.

> On Wed, Jul 02, 2008 at 11:37:27AM +1000, Darren Jenkins" wrote:
> > G'day people
> > 
> > Coverity CID: 2265 NEGATIVE_RETURNS
> > 
> > "rate" is of an unsigned type, and the code requires a signed type.
> > The following patch makes it so.
> > 
> > Only compile tested.
> > 
> > Signed-off-by: Darren Jenkins <darrenrjenkins@...ilcom>
> > 
> > diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
> > index 62a3d8f..31d38cd 100644
> > --- a/drivers/net/wireless/iwlwifi/iwl-3945.c
> > +++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
> > @@ -449,7 +449,7 @@ static void iwl3945_dbg_report_frame(struct iwl3945_priv *priv,
> >  
> >  	if (print_summary) {
> >  		char *title;
> > -		u32 rate;
> > +		int rate;
> >  
> >  		if (hundred)
> >  			title = "100Frames";

The rate variable here takes two roles: one for calculate the index
(singed) and the other for the actual rate (unsigned). I think if you do
want to fix this, create another local variable int idx to hold the
index result.

Thanks,
-yi

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