Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2c84c297 authored by Tomas Winkler's avatar Tomas Winkler Committed by Greg Kroah-Hartman
Browse files

mei: support polling for event notification 



Polling on priority events is translated on waiting for event
notification. One need to enable notification prior for
calling select or poll system call otherwise process
will not wait.

Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3c7c8468

drivers/misc/mei/main.c

+8 −0
Original line number Diff line number Diff line
@@ -608,6 +608,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait) 
	struct mei_cl *cl = file->private_data;

	struct mei_device *dev;

	unsigned int mask = 0;

	bool notify_en;



	if (WARN_ON(!cl || !cl->dev))

		return POLLERR;
@@ -616,6 +617,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait) 


	mutex_lock(&dev->device_lock);



	notify_en = cl->notify_en && (req_events & POLLPRI);



	if (dev->dev_state != MEI_DEV_ENABLED ||

	    !mei_cl_is_connected(cl)) {
@@ -628,6 +630,12 @@ static unsigned int mei_poll(struct file *file, poll_table *wait) 
		goto out;

	}



	if (notify_en) {

		poll_wait(file, &cl->ev_wait, wait);

		if (cl->notify_ev)

			mask |= POLLPRI;

	}



	if (req_events & (POLLIN | POLLRDNORM)) {

		poll_wait(file, &cl->rx_wait, wait);