linux-kernel - Re: [PATCH] efivarfs: fix abnormal GUID in variable name by using strcpy to replace null with dash

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Date:	Wed, 06 Mar 2013 11:21:27 +0000
From:	Matt Fleming <matt@...sole-pimps.org>
To:	Lingzhu Xiang <lxiang@...hat.com>
Cc:	joeyli <jlee@...e.com>, linux-efi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Michael Schroeder <mls@...e.com>,
	Josh Boyer <jwboyer@...hat.com>,
	Peter Jones <pjones@...hat.com>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Frederic Crozat <fcrozat@...e.com>
Subject: Re: [PATCH] efivarfs: fix abnormal GUID in variable name by using
 strcpy to replace null with dash

On Wed, 2013-03-06 at 17:20 +0800, Lingzhu Xiang wrote:
> On 03/06/2013 03:34 PM, joeyli wrote:
> > +static unsigned long variable_name_length(efi_char16_t *variable_name)
> > +{
> > +	unsigned long len;
> > +	efi_char16_t c;
> > +
> > +	len = 2;
> > +	do {
> > +		c = variable_name[len / sizeof(c) - 1];
> > +		if (c)
> > +			len += sizeof(c);
> > +	} while (c);
> > +
> > +	return len;
> > +}
> > +
> 
> It looks like this function can be replaced with utf16_strsize.

Nearly. For this particular case we also need to count the terminating
NULL.

-- 
Matt Fleming, Intel Open Source Technology Center

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