This is a note to let you know that I've just added the patch titled
USB: Fix LPM disable count mismatch on driver unbind.
to the 3.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-fix-lpm-disable-count-mismatch-on-driver-unbind.patch
and it can be found in the queue-3.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 249719121bc2b841bdfcab5eb21b10d8b871743b Mon Sep 17 00:00:00 2001
From: Sarah Sharp <[email protected]>
Date: Thu, 5 Jul 2012 14:09:30 -0700
Subject: USB: Fix LPM disable count mismatch on driver unbind.
From: Sarah Sharp <[email protected]>
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 <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
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);
Patches currently in stable-queue which might be from
[email protected] are
queue-3.5/usb-fix-lpm-disable-count-mismatch-on-driver-unbind.patch
queue-3.5/usb-disable-lpm-while-the-device-is-unconfigured.patch
queue-3.5/usb-remove-unused-lpm-variable.patch
queue-3.5/usb-fix-lpm-disable-enable-during-device-reset.patch
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