diff options
| author | Tomas Winkler <tomas.winkler@intel.com> | 2017-12-12 12:27:06 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-13 14:10:47 +0100 |
| commit | 8d52af6795c0480a20272159103976a893603fde (patch) | |
| tree | 90d5c6b664176a0b7e382ddf015009be2dc23551 /drivers/misc/mei/bus.c | |
| parent | Merge 4.15-rc3 into char-misc-next (diff) | |
| download | linux-8d52af6795c0480a20272159103976a893603fde.tar.xz linux-8d52af6795c0480a20272159103976a893603fde.zip | |
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/bus.c')
| -rw-r--r-- | drivers/misc/mei/bus.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 1ac10cb64d6e..2a5146bdecf1 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -543,14 +543,20 @@ int mei_cldev_disable(struct mei_cl_device *cldev) mutex_lock(&bus->device_lock); if (!mei_cl_is_connected(cl)) { - dev_dbg(bus->dev, "Already disconnected"); + dev_dbg(bus->dev, "Already disconnected\n"); + err = 0; + goto out; + } + + if (bus->dev_state == MEI_DEV_POWER_DOWN) { + dev_dbg(bus->dev, "Device is powering down don't botther with disconnection\n"); err = 0; goto out; } err = mei_cl_disconnect(cl); if (err < 0) - dev_err(bus->dev, "Could not disconnect from the ME client"); + dev_err(bus->dev, "Could not disconnect from the ME client\n"); out: /* Flush queues and remove any pending read */ |