From 34af19132ed77b51f84274c23cef4ed520542319 Mon Sep 17 00:00:00 2001 From: Alexander Usyskin Date: Tue, 13 Oct 2015 15:02:38 +0300 Subject: mei: keep the device awake during reads in chunks Long messages are read in chunks, to prevent trashing runtime pm between the reading of the chunks we call pm_runtime_mark_last_busy() on non-final chunk message as the next chunk of the same message will be received immediately in the next interrupt with high probablity. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/interrupt.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/misc') diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index c418d7888994..64b568a0268d 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -21,6 +21,7 @@ #include #include #include +#include #include @@ -147,6 +148,9 @@ int mei_cl_irq_read_msg(struct mei_cl *cl, cb->read_time = jiffies; cl_dbg(dev, cl, "completed read length = %lu\n", cb->buf_idx); list_move_tail(&cb->list, &complete_list->list); + } else { + pm_runtime_mark_last_busy(dev->dev); + pm_request_autosuspend(dev->dev); } out: -- cgit v1.2.3