uas: Add suspend/resume support (0df1f663) · Commits · 戴 / test

drivers/usb/storage/uas.c

+42 −0

Original line number	Diff line number	Diff line
		@@ -1091,6 +1091,45 @@ static int uas_post_reset(struct usb_interface *intf)
		return 0;
		}

		static int uas_suspend(struct usb_interface *intf, pm_message_t message)
		{
		struct Scsi_Host *shost = usb_get_intfdata(intf);
		struct uas_dev_info devinfo = (void )shost->hostdata[0];

		/* Wait for any pending requests to complete */
		flush_work(&devinfo->work);
		if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000) == 0) {
		shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__);
		return -ETIME;
		}

		return 0;
		}

		static int uas_resume(struct usb_interface *intf)
		{
		return 0;
		}

		static int uas_reset_resume(struct usb_interface *intf)
		{
		struct Scsi_Host *shost = usb_get_intfdata(intf);
		struct uas_dev_info devinfo = (void )shost->hostdata[0];
		unsigned long flags;

		if (uas_configure_endpoints(devinfo) != 0) {
		shost_printk(KERN_ERR, shost,
		"%s: alloc streams error after reset", __func__);
		return -EIO;
		}

		spin_lock_irqsave(shost->host_lock, flags);
		scsi_report_bus_reset(shost, 0);
		spin_unlock_irqrestore(shost->host_lock, flags);

		return 0;
		}

		static void uas_disconnect(struct usb_interface *intf)
		{
		struct Scsi_Host *shost = usb_get_intfdata(intf);
		@@ -1114,6 +1153,9 @@ static struct usb_driver uas_driver = {
		.disconnect = uas_disconnect,
		.pre_reset = uas_pre_reset,
		.post_reset = uas_post_reset,
		.suspend = uas_suspend,
		.resume = uas_resume,
		.reset_resume = uas_reset_resume,
		.id_table = uas_usb_ids,
		};