From: Alexander Usyskin <[email protected]> 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 <[email protected]> Signed-off-by: Tomas Winkler <[email protected]> --- drivers/misc/mei/interrupt.c | 4 ++++ 1 file changed, 4 insertions(+) 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 <linux/fs.h> #include <linux/jiffies.h> #include <linux/slab.h> +#include <linux/pm_runtime.h> #include <linux/mei.h> @@ -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: -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
