tree 090f1739245a42ef4c147d36e52c3aca557b4dcd
parent 5185432277ddf5bd91ad5af29cd1945f25ed10fc
author Laszlo Ersek <lersek@redhat.com> 1305294340 -0400
committer Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 1305294340 -0400

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>