From: Jeremy Fitzhardinge <jeremy@goop.org>
To: "Jun Zhu (Intern)" <Jun.Zhu@citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: A bug in Xenbus driver
Date: Wed, 25 Aug 2010 12:15:03 -0700 [thread overview]
Message-ID: <4C756BB7.70801@goop.org> (raw)
In-Reply-To: <4C756ADF.1000207@goop.org>
On 08/25/2010 12:11 PM, Jeremy Fitzhardinge wrote:
> copy_to_user returns the number of uncopied bytes, so if ret != sz, then
> some part of the data was not copied due to a memory fault problem.
No, wait, I've contradicted myself. copy_to_user does return the number
of uncopied bytes, so the result should be 0 on success, and you're
right, the test should be "ret != 0".
Sorry about that.
J
next prev parent reply other threads:[~2010-08-25 19:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-25 18:57 A bug in Xenbus driver Jun Zhu (Intern)
2010-08-25 19:11 ` Jeremy Fitzhardinge
2010-08-25 19:15 ` Jeremy Fitzhardinge [this message]
2010-08-25 19:19 ` Jeremy Fitzhardinge
2010-08-26 8:25 ` Jun Zhu (Intern)
2010-08-26 16:34 ` Jeremy Fitzhardinge
2010-08-27 11:03 ` Jun Zhu (Intern)
2010-08-27 12:38 ` Jun Zhu (Intern)
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