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| author |   Tomas Winkler <tomas.winkler@intel.com> | 2014-03-18 22:52:01 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-03 19:20:24 -0400 |
| commit | a532bbedc85ff3b834ba81e49163a3f543be1775 (patch) | |
| tree | 44dd2f1934aa24dda9a42e303497c35f943efc48 /drivers/misc/mei/init.c | |
| parent | mei: me: add pg exit and entry flow commands (diff) | |
| download | linux-dev-a532bbedc85ff3b834ba81e49163a3f543be1775.tar.xz linux-dev-a532bbedc85ff3b834ba81e49163a3f543be1775.zip | |
mei: add function to check write queues
The driver needs to check whether the write
queue idle before entering power gating
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@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.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 4b1eb37344cb..abc5ea053bf7 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -303,7 +303,28 @@ void mei_stop(struct mei_device *dev) } EXPORT_SYMBOL_GPL(mei_stop); +/** + * mei_write_is_idle - check if the write queues are idle + * + * @dev: the device structure + * + * returns true of there is no pending write + */ +bool mei_write_is_idle(struct mei_device *dev) +{ + bool idle = (dev->dev_state == MEI_DEV_ENABLED && + list_empty(&dev->ctrl_wr_list.list) && + list_empty(&dev->write_list.list)); + dev_dbg(&dev->pdev->dev, "write pg: is idle[%d] state=%s ctrl=%d write=%d\n", + idle, + mei_dev_state_str(dev->dev_state), + list_empty(&dev->ctrl_wr_list.list), + list_empty(&dev->write_list.list)); + + return idle; +} +EXPORT_SYMBOL_GPL(mei_write_is_idle); void mei_device_init(struct mei_device *dev) { |