diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2011-04-08 15:05:36 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-05-09 15:06:35 -0700 |
| commit | 52adc5764d7cbeddce5e70aac1a14f534d004b60 (patch) | |
| tree | 57210c662bce7cda42c7303312fd7defaeaa4447 /drivers/scsi | |
| parent | 5c9843ab660296536df95d53f44979bece79a87b (diff) | |
scsi_dh: fix reference counting in scsi_dh_activate error path
commit 0b8393578c70bc1f09790eeae7d918f38da2e010 upstream.
Commit db422318cbca55168cf965f655471dbf8be82433 ([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: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/device_handler/scsi_dh.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh.c b/drivers/scsi/device_handler/scsi_dh.c index b837c5b3c8f..1367b919c49 100644 --- a/drivers/scsi/device_handler/scsi_dh.c +++ b/drivers/scsi/device_handler/scsi_dh.c @@ -437,12 +437,14 @@ 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; @@ -453,12 +455,13 @@ 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); |