linux-kernel - Re: [PATCH 2/5] net/sunrpc: use kstrtoul, etc

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Message-ID: <alpine.DEB.2.02.1111090710000.1899@hadrien>
Date:	Wed, 9 Nov 2011 07:15:32 +0100 (CET)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Alexey Dobriyan <adobriyan@...il.com>
cc:	"J. Bruce Fields" <bfields@...ldses.org>,
	kernel-janitors@...r.kernel.org, Neil Brown <neilb@...e.de>,
	Trond Myklebust <Trond.Myklebust@...app.com>,
	"David S. Miller" <davem@...emloft.net>, linux-nfs@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] net/sunrpc: use kstrtoul, etc

In looking through some examples, I see, e.g.:

 	if (strict_strtoul(buf, 10, &val) < 0)
  		return -EINVAL;
 	if (val < 1 || val > 2)
  		return -EINVAL;

In this case the only valid values are 1 and 2, which are much smaller 
than the u8 range.  Is it useful to use kstrtou8 anyway?  I see that 
kstrtou8 returns -ERANGE not -EINVAL when the value is out of bounds.  If 
kstrtou8 is to be used, should the subsequent if (val < 1 || val > 2) now 
return -ERANGE to be consistent?

julia
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