xen: xenfs: privcmd: check put_user() return code
authorVasiliy Kulikov <segooon@gmail.com>
Thu, 28 Oct 2010 11:39:02 +0000 (15:39 +0400)
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Fri, 29 Oct 2010 18:02:25 +0000 (11:02 -0700)
put_user() may fail.  In this case propagate error code from
privcmd_ioctl_mmap_batch().

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

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