diff options
Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
| -rw-r--r-- | drivers/scsi/scsi_sysfs.c | 75 |
1 files changed, 25 insertions, 50 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index c23ab978c3ba..76ee2e784f75 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -11,6 +11,7 @@ #include <linux/init.h> #include <linux/blkdev.h> #include <linux/device.h> +#include <linux/pm_runtime.h> #include <scsi/scsi.h> #include <scsi/scsi_device.h> @@ -250,6 +251,7 @@ shost_rd_attr(host_busy, "%hu\n"); shost_rd_attr(cmd_per_lun, "%hd\n"); shost_rd_attr(can_queue, "%hd\n"); shost_rd_attr(sg_tablesize, "%hu\n"); +shost_rd_attr(sg_prot_tablesize, "%hu\n"); shost_rd_attr(unchecked_isa_dma, "%d\n"); shost_rd_attr(prot_capabilities, "%u\n"); shost_rd_attr(prot_guard_type, "%hd\n"); @@ -261,6 +263,7 @@ static struct attribute *scsi_sysfs_shost_attrs[] = { &dev_attr_cmd_per_lun.attr, &dev_attr_can_queue.attr, &dev_attr_sg_tablesize.attr, + &dev_attr_sg_prot_tablesize.attr, &dev_attr_unchecked_isa_dma.attr, &dev_attr_proc_name.attr, &dev_attr_scan.attr, @@ -376,57 +379,13 @@ static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) return 0; } -static int scsi_bus_suspend(struct device * dev, pm_message_t state) -{ - struct device_driver *drv; - struct scsi_device *sdev; - int err; - - if (dev->type != &scsi_dev_type) - return 0; - - drv = dev->driver; - sdev = to_scsi_device(dev); - - err = scsi_device_quiesce(sdev); - if (err) - return err; - - if (drv && drv->suspend) { - err = drv->suspend(dev, state); - if (err) - return err; - } - - return 0; -} - -static int scsi_bus_resume(struct device * dev) -{ - struct device_driver *drv; - struct scsi_device *sdev; - int err = 0; - - if (dev->type != &scsi_dev_type) - return 0; - - drv = dev->driver; - sdev = to_scsi_device(dev); - - if (drv && drv->resume) - err = drv->resume(dev); - - scsi_device_resume(sdev); - - return err; -} - struct bus_type scsi_bus_type = { .name = "scsi", .match = scsi_bus_match, .uevent = scsi_bus_uevent, - .suspend = scsi_bus_suspend, - .resume = scsi_bus_resume, +#ifdef CONFIG_PM_OPS + .pm = &scsi_bus_pm_ops, +#endif }; EXPORT_SYMBOL_GPL(scsi_bus_type); @@ -848,8 +807,6 @@ static int scsi_target_add(struct scsi_target *starget) if (starget->state != STARGET_CREATED) return 0; - device_enable_async_suspend(&starget->dev); - error = device_add(&starget->dev); if (error) { dev_err(&starget->dev, "target device_add failed, error %d\n", error); @@ -858,6 +815,10 @@ static int scsi_target_add(struct scsi_target *starget) transport_add_device(&starget->dev); starget->state = STARGET_RUNNING; + pm_runtime_set_active(&starget->dev); + pm_runtime_enable(&starget->dev); + device_enable_async_suspend(&starget->dev); + return 0; } @@ -887,7 +848,20 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev) return error; transport_configure_device(&starget->dev); + device_enable_async_suspend(&sdev->sdev_gendev); + scsi_autopm_get_target(starget); + pm_runtime_set_active(&sdev->sdev_gendev); + pm_runtime_forbid(&sdev->sdev_gendev); + pm_runtime_enable(&sdev->sdev_gendev); + scsi_autopm_put_target(starget); + + /* The following call will keep sdev active indefinitely, until + * its driver does a corresponding scsi_autopm_pm_device(). Only + * drivers supporting autosuspend will do this. + */ + scsi_autopm_get_device(sdev); + error = device_add(&sdev->sdev_gendev); if (error) { printk(KERN_INFO "error 1\n"); @@ -990,10 +964,11 @@ static void __scsi_remove_target(struct scsi_target *starget) list_for_each_entry(sdev, &shost->__devices, siblings) { if (sdev->channel != starget->channel || sdev->id != starget->id || - sdev->sdev_state == SDEV_DEL) + scsi_device_get(sdev)) continue; spin_unlock_irqrestore(shost->host_lock, flags); scsi_remove_device(sdev); + scsi_device_put(sdev); spin_lock_irqsave(shost->host_lock, flags); goto restart; } |