netdev - Re: [net-next 06/10] ixgbe: eliminate Smatch warnings in ixgbe

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Date:	Tue, 27 Nov 2012 10:18:04 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	"Hay, Joshua A" <joshua.a.hay@...el.com>
Cc:	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"gospo@...hat.com" <gospo@...hat.com>,
	"sassmann@...hat.com" <sassmann@...hat.com>
Subject: Re: [net-next 06/10] ixgbe: eliminate Smatch warnings in
 ixgbe_debugfs.c

On Tue, Nov 27, 2012 at 01:06:17AM +0000, Hay, Joshua A wrote:
> The return value will be changed to len to preserve error codes returned from simple_write_to_buffer.
> 
> However, changing the logic preceding this return breaks these functions.  If simple_write_to_buffer returns a positive value, other actions are performed with this value.  With this patch, the function will return immediately with that value instead.  This will effectively break the ixgbe_debugfs write operations.
> 
> So ultimately, the change should be: 
> > +	len = simple_write_to_buffer(ixgbe_dbg_reg_ops_buf,
> > +				     sizeof(ixgbe_dbg_reg_ops_buf)-1,
> > +				     ppos,
> > +				     buffer,
> > +				     count);
> > +	if (len < 0)
> > +		return -EFAULT;
> 	
> 	if (len < 0)
> 		return len;
> 

Yes.  Sorry, I wasn't reading carefully before.  That looks fine.

regards,
dan carpenter
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