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path: root/drivers/usb/core
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Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/hub.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index f1efabbc1ca..107e1d25dde 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1822,9 +1822,15 @@ static int check_port_resume_type(struct usb_device *udev,
status = -ENODEV;
}
- /* Can't do a normal resume if the port isn't enabled */
- else if (!(portstatus & USB_PORT_STAT_ENABLE) && !udev->reset_resume)
- status = -ENODEV;
+ /* Can't do a normal resume if the port isn't enabled,
+ * so try a reset-resume instead.
+ */
+ else if (!(portstatus & USB_PORT_STAT_ENABLE) && !udev->reset_resume) {
+ if (udev->persist_enabled)
+ udev->reset_resume = 1;
+ else
+ status = -ENODEV;
+ }
if (status) {
dev_dbg(hub->intfdev,
@@ -1973,6 +1979,7 @@ static int finish_port_resume(struct usb_device *udev)
* resumed.
*/
if (udev->reset_resume)
+ retry_reset_resume:
status = usb_reset_and_verify_device(udev);
/* 10.5.4.5 says be sure devices in the tree are still there.
@@ -1984,6 +1991,13 @@ static int finish_port_resume(struct usb_device *udev)
status = usb_get_status(udev, USB_RECIP_DEVICE, 0, &devstatus);
if (status >= 0)
status = (status > 0 ? 0 : -ENODEV);
+
+ /* If a normal resume failed, try doing a reset-resume */
+ if (status && !udev->reset_resume && udev->persist_enabled) {
+ dev_dbg(&udev->dev, "retry with reset-resume\n");
+ udev->reset_resume = 1;
+ goto retry_reset_resume;
+ }
}
if (status) {