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scsi: libsas: only clear phy->in_shutdown after shutdown event done 

When the event queue is full of phy up and down events and reached the
threshold, we will queue a shutdown-event, and set phy->in_shutdown so that
we will not queue a shutdown-event again. But before the shutdown-event can
be executed, every phy-down event will clear
phy->in_shutdown and a new shutdown-event will be queued. The queue will
be full of these shutdown-events.

Fix this by only clear phy->in_shutdown in sas_phye_shutdown(), that is
after the first shutdown-event has been executed.

Fixes: f12486e06a ("scsi: libsas: shut down the PHY if events reached the threshold")
Signed-off-by: Jason Yan <yanaijie@huawei.com>
CC: John Garry <john.garry@huawei.com>
CC: Johannes Thumshirn <jthumshirn@suse.de>
CC: Ewan Milne <emilne@redhat.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Tomas Henzl <thenzl@redhat.com>
CC: Dan Williams <dan.j.williams@intel.com>
CC: Hannes Reinecke <hare@suse.com>
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Jason Yan 2019-05-14 10:42:38 +08:00 committed by Martin K. Petersen
parent 12e750bc62
commit 04cf8b32bc
1 changed files with 1 additions and 2 deletions
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3
drivers/scsi/libsas/sas_phy.c
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@ -35,7 +35,6 @@ static void sas_phye_loss_of_signal(struct work_struct *work)
struct asd_sas_event *ev = to_asd_sas_event(work);
struct asd_sas_phy *phy = ev->phy;
phy->in_shutdown = 0;
phy->error = 0;
sas_deform_port(phy, 1);
}
@ -45,7 +44,6 @@ static void sas_phye_oob_done(struct work_struct *work)
struct asd_sas_event *ev = to_asd_sas_event(work);
struct asd_sas_phy *phy = ev->phy;
phy->in_shutdown = 0;
phy->error = 0;
}
@ -126,6 +124,7 @@ static void sas_phye_shutdown(struct work_struct *work)
ret);
} else
pr_notice("phy%d is not enabled, cannot shutdown\n", phy->id);
phy->in_shutdown = 0;
}
/* ---------- Phy class registration ---------- */