From: Greg KH <gre...@linuxfoundation.org>
3.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sarah Sharp <sarah.a.sh...@linux.intel.com>
commit 249719121bc2b841bdfcab5eb21b10d8b871743b upstream.
When a user runs `echo 0 > bConfigurationValue` for a USB 3.0 device,
usb_disable_device() is called. This function disables all drivers,
deallocates interfaces, and sets the device configuration value to 0
(unconfigured).
With the new scheme to ensure that unconfigured devices have LPM
disabled, usb_disable_device() must call usb_unlocked_disable_lpm() once
it unconfigures the device.
This commit should be backported to kernels as old as 3.5, that contain
the commit 8306095fd2c1100e8244c09bf560f97aca5a311d "USB: Disable USB
3.0 LPM in critical sections."
Signed-off-by: Sarah Sharp <sarah.a.sh...@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/usb/core/message.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1174,6 +1174,7 @@ void usb_disable_device(struct usb_devic
put_device(&dev->actconfig->interface[i]->dev);
dev->actconfig->interface[i] = NULL;
}
+ usb_unlocked_disable_lpm(dev);
dev->actconfig = NULL;
if (dev->state == USB_STATE_CONFIGURED)
usb_set_device_state(dev, USB_STATE_ADDRESS);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
