This is a note to let you know that I've just added the patch titled
Revert "Bluetooth: Enable autosuspend for Intel Bluetooth device"
to the 3.14-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:
revert-bluetooth-enable-autosuspend-for-intel-bluetooth-device.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 3c49aa852e00978ba2f1a4d1e4598a0c669a5347 Mon Sep 17 00:00:00 2001
From: Marcel Holtmann <[email protected]>
Date: Tue, 22 Apr 2014 14:04:16 -0700
Subject: Revert "Bluetooth: Enable autosuspend for Intel Bluetooth device"
From: Marcel Holtmann <[email protected]>
commit 3c49aa852e00978ba2f1a4d1e4598a0c669a5347 upstream.
This reverts commit d2bee8fb6e18f6116aada39851918473761f7ab1.
Enabling autosuspend for Intel Bluetooth devices has been shown to not
work reliable. It does work for some people with certain combinations
of USB host controllers, but for others it puts the device to sleep and
it will not wake up for any event.
These events can be important ones like HCI Inquiry Complete or HCI
Connection Request. The events will arrive as soon as you poke the
device with a new command, but that is not something we can do in
these cases.
Initially there were patches to the xHCI USB controller that fixed
this for some people, but not for all. This could be well a problem
somewhere in the USB subsystem or in the USB host controllers or
just plain a hardware issue somewhere. At this moment we just do
not know and the only safe action is to revert this patch.
Signed-off-by: Marcel Holtmann <[email protected]>
Cc: Tedd Ho-Jeong An <[email protected]>
Signed-off-by: Gustavo Padovan <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/bluetooth/btusb.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -1479,10 +1479,8 @@ static int btusb_probe(struct usb_interf
if (id->driver_info & BTUSB_BCM92035)
hdev->setup = btusb_setup_bcm92035;
- if (id->driver_info & BTUSB_INTEL) {
- usb_enable_autosuspend(data->udev);
+ if (id->driver_info & BTUSB_INTEL)
hdev->setup = btusb_setup_intel;
- }
/* Interface numbers are hardcoded in the specification */
data->isoc = usb_ifnum_to_if(data->udev, 1);
Patches currently in stable-queue which might be from [email protected] are
queue-3.14/bluetooth-fix-triggering-br-edr-l2cap-connect-too-early.patch
queue-3.14/revert-bluetooth-enable-autosuspend-for-intel-bluetooth-device.patch
queue-3.14/bluetooth-fix-redundant-encryption-request-for-reauthentication.patch
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