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| author |   David Vrabel <david.vrabel@citrix.com> | 2014-07-02 17:25:23 +0100 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2014-07-03 11:02:28 +0100 |
| commit | 1b6478231c6f5f844185acb32045cf195028cfce (patch) | |
| tree | 857d9e129051b69c8207c9785a74849dc03e0158 /include | |
| parent | xen/grant-table: fix suspend for non-PV guests (diff) | |
| download | linux-dev-1b6478231c6f5f844185acb32045cf195028cfce.tar.xz linux-dev-1b6478231c6f5f844185acb32045cf195028cfce.zip | |
xen/manage: fix potential deadlock when resuming the console
Calling xen_console_resume() in xen_suspend() causes a warning because
it locks irq_mapping_update_lock (a mutex) and this may sleep. If a
userspace process is using the evtchn device then this mutex may be
locked at the point of the stop_machine() call and
xen_console_resume() would then deadlock.
Resuming the console after stop_machine() returns avoids this
deadlock.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: <stable@vger.kernel.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions