From: Laszlo Ersek <lersek@redhat.com>
Date: Fri, 13 May 2011 13:45:40 +0000 (-0400)
Subject: xen/blkback: fix xenbus_transaction_start() hang caused by double xenbus_transaction_... 
X-Git-Tag: v3.0-rc1~162^2~16^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=496b318eb65558c1a3a4fe882cb9da6d1dc6493a;p=pandora-kernel.git

xen/blkback: fix xenbus_transaction_start() hang caused by double xenbus_transaction_end()

vbd_resize() up_read()'s xs_state.suspend_mutex twice in a row via double
xenbus_transaction_end() calls. The next down_read() in
xenbus_transaction_start() (at eg. the next resize attempt) hangs.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=618317

Acked-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---

Reading git-diff-tree failed