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authorTomas Winkler <tomas.winkler@intel.com>2017-12-12 14:27:06 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-12-13 16:10:47 +0300
commit8d52af6795c0480a20272159103976a893603fde (patch)
tree90d5c6b664176a0b7e382ddf015009be2dc23551 /drivers/misc/mei/init.c
parent2fc10246766fce0b560f015e1c0b6ff29fb4ced0 (diff)
downloadlinux-8d52af6795c0480a20272159103976a893603fde.tar.xz
mei: speed up the power down flow
When mei driver is powering down due to suspend or shutdown it will iterate over the mei client bus and disconnect each client device attached in turn. The power down flow consist of the link rest, which causes all clients get disconnected at once, hence the individual disconnection can be omitted and significantly reduce power down flow. Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/init.c')
-rw-r--r--drivers/misc/mei/init.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index d2f691424dd1..c46f6e99a55e 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -310,6 +310,9 @@ void mei_stop(struct mei_device *dev)
{
dev_dbg(dev->dev, "stopping the device.\n");
+ mutex_lock(&dev->device_lock);
+ dev->dev_state = MEI_DEV_POWER_DOWN;
+ mutex_unlock(&dev->device_lock);
mei_cl_bus_remove_devices(dev);
mei_cancel_work(dev);
@@ -319,7 +322,6 @@ void mei_stop(struct mei_device *dev)
mutex_lock(&dev->device_lock);
- dev->dev_state = MEI_DEV_POWER_DOWN;
mei_reset(dev);
/* move device to disabled state unconditionally */
dev->dev_state = MEI_DEV_DISABLED;