Commit 0b839357 authored by Mike Snitzer's avatar Mike Snitzer Committed by James Bottomley

[SCSI] scsi_dh: fix reference counting in scsi_dh_activate error path

Commit db422318 ([SCSI] scsi_dh:
propagate SCSI device deletion) introduced a regression where the device
reference is not dropped prior to scsi_dh_activate's early return from
the error path.
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Cc: stable@kernel.org # 2.6.38
Reviewed-by: default avatarMike Christie <michaelc@cs.wisc.edu>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent a1f74ae8
......@@ -394,12 +394,14 @@ int scsi_dh_activate(struct request_queue *q, activate_complete fn, void *data)
unsigned long flags;
struct scsi_device *sdev;
struct scsi_device_handler *scsi_dh = NULL;
struct device *dev = NULL;
spin_lock_irqsave(q->queue_lock, flags);
sdev = q->queuedata;
if (sdev && sdev->scsi_dh_data)
scsi_dh = sdev->scsi_dh_data->scsi_dh;
if (!scsi_dh || !get_device(&sdev->sdev_gendev) ||
dev = get_device(&sdev->sdev_gendev);
if (!scsi_dh || !dev ||
sdev->sdev_state == SDEV_CANCEL ||
sdev->sdev_state == SDEV_DEL)
err = SCSI_DH_NOSYS;
......@@ -410,12 +412,13 @@ int scsi_dh_activate(struct request_queue *q, activate_complete fn, void *data)
if (err) {
if (fn)
fn(data, err);
return err;
goto out;
}
if (scsi_dh->activate)
err = scsi_dh->activate(sdev, fn, data);
put_device(&sdev->sdev_gendev);
out:
put_device(dev);
return err;
}
EXPORT_SYMBOL_GPL(scsi_dh_activate);
......
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