diff options
Diffstat (limited to 'drivers/scsi/scsi_scan.c')
| -rw-r--r-- | drivers/scsi/scsi_scan.c | 74 |
1 files changed, 17 insertions, 57 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 2808c0cb5711..23e1c0acdeae 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 @@ -453,6 +469,7 @@ 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; @@ -1901,60 +1918,3 @@ void scsi_forget_host(struct Scsi_Host *shost) spin_unlock_irqrestore(shost->host_lock, flags); } -/** - * scsi_get_host_dev - Create a scsi_device that points to the host adapter itself - * @shost: Host that needs a scsi_device - * - * Lock status: None assumed. - * - * Returns: The scsi_device or NULL - * - * Notes: - * Attach a single scsi_device to the Scsi_Host - this should - * be made to look like a "pseudo-device" that points to the - * HA itself. - * - * Note - this device is not accessible from any high-level - * drivers (including generics), which is probably not - * optimal. We can add hooks later to attach. - */ -struct scsi_device *scsi_get_host_dev(struct Scsi_Host *shost) -{ - struct scsi_device *sdev = NULL; - struct scsi_target *starget; - - mutex_lock(&shost->scan_mutex); - if (!scsi_host_scan_allowed(shost)) - goto out; - starget = scsi_alloc_target(&shost->shost_gendev, 0, shost->this_id); - if (!starget) - goto out; - - sdev = scsi_alloc_sdev(starget, 0, NULL); - if (sdev) - sdev->borken = 0; - else - scsi_target_reap(starget); - put_device(&starget->dev); - out: - mutex_unlock(&shost->scan_mutex); - return sdev; -} -EXPORT_SYMBOL(scsi_get_host_dev); - -/** - * scsi_free_host_dev - Free a scsi_device that points to the host adapter itself - * @sdev: Host device to be freed - * - * Lock status: None assumed. - * - * Returns: Nothing - */ -void scsi_free_host_dev(struct scsi_device *sdev) -{ - BUG_ON(sdev->id != sdev->host->this_id); - - __scsi_remove_device(sdev); -} -EXPORT_SYMBOL(scsi_free_host_dev); - |