From: Alexander Usyskin <alexander.usyskin@intel.com>
Date: Thu, 7 May 2015 12:53:59 +0000 (+0300)
Subject: mei: request autosuspend at the end of write
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a1809d38900cff016b2bac9d82766f7420f8eb5d;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

mei: request autosuspend at the end of write

On longer non-blocking write might not complete at the end of
autosuspend expiration, therefore we request autosuspend
again on the write completion.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index ce88c2199b2c..7a5a6636f0fd 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -1459,12 +1459,18 @@ err:
  */
 void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb)
 {
+	struct mei_device *dev = cl->dev;
+
 	switch (cb->fop_type) {
 	case MEI_FOP_WRITE:
 		mei_io_cb_free(cb);
 		cl->writing_state = MEI_WRITE_COMPLETE;
-		if (waitqueue_active(&cl->tx_wait))
+		if (waitqueue_active(&cl->tx_wait)) {
 			wake_up_interruptible(&cl->tx_wait);
+		} else {
+			pm_runtime_mark_last_busy(dev->dev);
+			pm_request_autosuspend(dev->dev);
+		}
 		break;
 
 	case MEI_FOP_READ: