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xen-blkback: replace work_pending with work_busy in purge_persistent_gnt()

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The BUG_ON() in purge_persistent_gnt() will be triggered when previous purge
work haven't finished.

There is a work_pending() before this BUG_ON, but it doesn't account if the work
is still currently running.

CC: stable@vger.kernel.org
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Bob Liu 2015-07-22 14:40:10 +08:00 committed by Konrad Rzeszutek Wilk
parent 7b0767502b
commit 53bc7dc004
1 changed files with 2 additions and 2 deletions
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4
drivers/block/xen-blkback/blkback.c
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@ -382,8 +382,8 @@ static void purge_persistent_gnt(struct xen_blkif *blkif)
return;
}
if (work_pending(&blkif->persistent_purge_work)) {
pr_alert_ratelimited("Scheduled work from previous purge is still pending, cannot purge list\n");
if (work_busy(&blkif->persistent_purge_work)) {
pr_alert_ratelimited("Scheduled work from previous purge is still busy, cannot purge list\n");
return;
}