uas: Add suspend/resume support
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 8023944..7a16ed8 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -1091,6 +1091,45 @@
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 @@
.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,
};