diff options
Diffstat (limited to 'drivers/scsi/scsi_scan.c')
| -rw-r--r-- | drivers/scsi/scsi_scan.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 0d0381df25f7..c86152f9c47a 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -123,6 +123,22 @@ struct async_scan_data { }; /** + * scsi_enable_async_suspend - Enable async suspend and resume + */ +void scsi_enable_async_suspend(struct device *dev) +{ + /* + * If a user has disabled async probing a likely reason is due to a + * storage enclosure that does not inject staggered spin-ups. For + * safety, make resume synchronous as well in that case. + */ + if (strncmp(scsi_scan_type, "async", 5) != 0) + return; + /* Enable asynchronous suspend and resume. */ + device_enable_async_suspend(dev); +} + +/** * scsi_complete_async_scans - Wait for asynchronous scans to complete * * When this function returns, any host which started scanning before @@ -454,6 +470,7 @@ static struct scsi_target *scsi_alloc_target(struct device *parent, dev_set_name(dev, "target%d:%d:%d", shost->host_no, channel, id); dev->bus = &scsi_bus_type; dev->type = &scsi_target_type; + scsi_enable_async_suspend(dev); starget->id = id; starget->channel = channel; starget->can_queue = 0; |