PM: Allow SCSI devices to suspend/resume asynchronously
Set power.async_suspend for all SCSI devices, targets and hosts, so that they can be suspended and resumed in parallel with the main suspend/resume thread and possibly with other devices they don't depend on in a known way (i.e. devices which are not their parents or children). The power.async_suspend flag is also set for devices that don't have suspend or resume callbacks, because otherwise they would make the main suspend/resume thread wait for their "asynchronous" children (during suspend) or parents (during resume), effectively negating the possible gains from executing these devices' suspend and resume callbacks asynchronously. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
parent
927bc9165d
commit
4cb077d93a
@ -215,6 +215,8 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,
|
|||||||
shost->shost_gendev.parent = dev ? dev : &platform_bus;
|
shost->shost_gendev.parent = dev ? dev : &platform_bus;
|
||||||
shost->dma_dev = dma_dev;
|
shost->dma_dev = dma_dev;
|
||||||
|
|
||||||
|
device_enable_async_suspend(&shost->shost_gendev);
|
||||||
|
|
||||||
error = device_add(&shost->shost_gendev);
|
error = device_add(&shost->shost_gendev);
|
||||||
if (error)
|
if (error)
|
||||||
goto out;
|
goto out;
|
||||||
@ -222,6 +224,8 @@ int scsi_add_host_with_dma(struct Scsi_Host *shost, struct device *dev,
|
|||||||
scsi_host_set_state(shost, SHOST_RUNNING);
|
scsi_host_set_state(shost, SHOST_RUNNING);
|
||||||
get_device(shost->shost_gendev.parent);
|
get_device(shost->shost_gendev.parent);
|
||||||
|
|
||||||
|
device_enable_async_suspend(&shost->shost_dev);
|
||||||
|
|
||||||
error = device_add(&shost->shost_dev);
|
error = device_add(&shost->shost_dev);
|
||||||
if (error)
|
if (error)
|
||||||
goto out_del_gendev;
|
goto out_del_gendev;
|
||||||
|
@ -847,6 +847,8 @@ static int scsi_target_add(struct scsi_target *starget)
|
|||||||
if (starget->state != STARGET_CREATED)
|
if (starget->state != STARGET_CREATED)
|
||||||
return 0;
|
return 0;
|
||||||
|
|
||||||
|
device_enable_async_suspend(&starget->dev);
|
||||||
|
|
||||||
error = device_add(&starget->dev);
|
error = device_add(&starget->dev);
|
||||||
if (error) {
|
if (error) {
|
||||||
dev_err(&starget->dev, "target device_add failed, error %d\n", error);
|
dev_err(&starget->dev, "target device_add failed, error %d\n", error);
|
||||||
@ -886,11 +888,13 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
|
|||||||
return error;
|
return error;
|
||||||
|
|
||||||
transport_configure_device(&starget->dev);
|
transport_configure_device(&starget->dev);
|
||||||
|
device_enable_async_suspend(&sdev->sdev_gendev);
|
||||||
error = device_add(&sdev->sdev_gendev);
|
error = device_add(&sdev->sdev_gendev);
|
||||||
if (error) {
|
if (error) {
|
||||||
printk(KERN_INFO "error 1\n");
|
printk(KERN_INFO "error 1\n");
|
||||||
goto out_remove;
|
goto out_remove;
|
||||||
}
|
}
|
||||||
|
device_enable_async_suspend(&sdev->sdev_dev);
|
||||||
error = device_add(&sdev->sdev_dev);
|
error = device_add(&sdev->sdev_dev);
|
||||||
if (error) {
|
if (error) {
|
||||||
printk(KERN_INFO "error 2\n");
|
printk(KERN_INFO "error 2\n");
|
||||||
|
Loading…
Reference in New Issue
Block a user