1 files changed, 25 insertions, 6 deletions

diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 34e3da5aa72a..45887a0ff873 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -24,6 +24,7 @@
 
 #include <linux/device.h>
 #include <linux/slab.h>
+#include <linux/export.h>
 #include <linux/usb.h>
 #include <linux/usb/quirks.h>
 #include <linux/usb/hcd.h>
@@ -1046,8 +1047,7 @@ static int usb_resume_device(struct usb_device *udev, pm_message_t msg)
         /* Non-root devices on a full/low-speed bus must wait for their
          * companion high-speed root hub, in case a handoff is needed.
          */
-        if (!(msg.event & PM_EVENT_AUTO) && udev->parent &&
-                        udev->bus->hs_companion)
+        if (!PMSG_IS_AUTO(msg) && udev->parent && udev->bus->hs_companion)
                 device_pm_wait_for_dev(&udev->dev,
                                 &udev->bus->hs_companion->root_hub->dev);
 
@@ -1075,7 +1075,7 @@ static int usb_suspend_interface(struct usb_device *udev,
 
         if (driver->suspend) {
                 status = driver->suspend(intf, msg);
-                if (status && !(msg.event & PM_EVENT_AUTO))
+                if (status && !PMSG_IS_AUTO(msg))
                         dev_err(&intf->dev, "%s error %d\n",
                                         "suspend", status);
         } else {
@@ -1189,7 +1189,7 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
                         status = usb_suspend_interface(udev, intf, msg);
 
                         /* Ignore errors during system sleep transitions */
-                        if (!(msg.event & PM_EVENT_AUTO))
+                        if (!PMSG_IS_AUTO(msg))
                                 status = 0;
                         if (status != 0)
                                 break;
@@ -1199,7 +1199,7 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
                 status = usb_suspend_device(udev, msg);
 
                 /* Again, ignore errors during system sleep transitions */
-                if (!(msg.event & PM_EVENT_AUTO))
+                if (!PMSG_IS_AUTO(msg))
                         status = 0;
         }
 
@@ -1583,7 +1583,7 @@ int usb_autopm_get_interface_async(struct usb_interface *intf)
         dev_vdbg(&intf->dev, "%s: cnt %d -> %d\n",
                         __func__, atomic_read(&intf->dev.power.usage_count),
                         status);
-        if (status > 0)
+        if (status > 0 || status == -EINPROGRESS)
                 status = 0;
         return status;
 }
@@ -1668,6 +1668,11 @@ int usb_runtime_suspend(struct device *dev)
                 return -EAGAIN;
 
         status = usb_suspend_both(udev, PMSG_AUTO_SUSPEND);
+
+        /* Allow a retry if autosuspend failed temporarily */
+        if (status == -EAGAIN || status == -EBUSY)
+                usb_mark_last_busy(udev);
+
         /* The PM core reacts badly unless the return code is 0,
          * -EAGAIN, or -EBUSY, so always return -EBUSY on an error.
          */
@@ -1700,6 +1705,20 @@ int usb_runtime_idle(struct device *dev)
         return 0;
 }
 
+int usb_set_usb2_hardware_lpm(struct usb_device *udev, int enable)
+{
+        struct usb_hcd *hcd = bus_to_hcd(udev->bus);
+        int ret = -EPERM;
+
+        if (hcd->driver->set_usb2_hw_lpm) {
+                ret = hcd->driver->set_usb2_hw_lpm(hcd, udev, enable);
+                if (!ret)
+                        udev->usb2_hw_lpm_enabled = enable;
+        }
+
+        return ret;
+}
+
 #endif /* CONFIG_USB_SUSPEND */
 
 struct bus_type usb_bus_type = {