42 lines
1.4 KiB
Diff
42 lines
1.4 KiB
Diff
|
From 640b53438c20818b3e344343b58b1f1765606a85 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Martin Pitt <martin.pitt@ubuntu.com>
|
||
|
|
Date: Mon, 31 Jan 2011 15:30:01 +0100
|
||
|
|
Subject: [PATCH] 49bluetooth: Wait for btusb module to get unused
|
||
|
|
|
||
|
|
The 49bluetooth hook disables /proc/acpi/ibm/bluetooth but this isn't
|
||
|
|
synchronous, i. e. it doesn't wait until the module usage count actually drops
|
||
|
|
to 0. Due to that, it's impossible to add btusb to SUSPEND_MODULES (on some
|
||
|
|
models/older kernels you need to do that to fix suspend problems), as at that
|
||
|
|
point the module is still in use.
|
||
|
|
|
||
|
|
On my system (ThinkPad X201) the module takes between 0.3 and 0.5 seconds to
|
||
|
|
unload, so use 100 ms wait steps with a timeout of 2 seconds.
|
||
|
|
|
||
|
|
Bug: https://bugs.freedesktop.org//show_bug.cgi?id=33759
|
||
|
|
Bug-Ubuntu: https://launchpad.net/bugs/698331
|
||
|
|
---
|
||
|
|
pm/sleep.d/49bluetooth | 9 +++++++++
|
||
|
|
1 files changed, 9 insertions(+), 0 deletions(-)
|
||
|
|
|
||
|
|
--- pm/sleep.d/49bluetooth
|
||
|
|
+++ pm/sleep.d/49bluetooth
|
||
|
|
@@ -12,6 +12,15 @@ suspend_bluetooth()
|
||
|
|
if grep -q enabled /proc/acpi/ibm/bluetooth; then
|
||
|
|
savestate ibm_bluetooth enable
|
||
|
|
echo disable > /proc/acpi/ibm/bluetooth
|
||
|
|
+
|
||
|
|
+ # wait for up to 2 seconds for the module to actually get
|
||
|
|
+ # unused
|
||
|
|
+ TIMEOUT=20
|
||
|
|
+ while [ $TIMEOUT -ge 0 ]; do
|
||
|
|
+ [ `cat /sys/module/btusb/refcnt` = 0 ] && break
|
||
|
|
+ TIMEOUT=$((TIMEOUT-1))
|
||
|
|
+ sleep 0.1
|
||
|
|
+ done
|
||
|
|
else
|
||
|
|
savestate ibm_bluetooth disable
|
||
|
|
fi
|
||
|
|
--
|
||
|
|
1.7.2.3
|
||
|
|
|