Patch "Revert "staging: nvec: ps2: change serio type to passthrough"" has been added to the 4.8-stable tree

This is a note to let you know that I've just added the patch titled

Revert "staging: nvec: ps2: change serio type to passthrough"

to the 4.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
revert-staging-nvec-ps2-change-serio-type-to-passthrough.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Paul Fertser <[email protected]>
Date: Thu, 27 Oct 2016 17:22:09 +0300
Subject: Revert "staging: nvec: ps2: change serio type to passthrough"

From: Paul Fertser <[email protected]>

commit 17c1c9ba15b238ef79b51cf40d855c05b58d5934 upstream.

This reverts commit 36b30d6138f4677514aca35ab76c20c1604baaad.

This is necessary to detect paz00 (ac100) touchpad properly as one speaking ETPS/2 protocol. Without it X.org's synaptics driver doesn't work as the touchpad is detected as an ImPS/2 mouse instead.

Commit ec6184b1c717b8768122e25fe6d312f609cc1bb4 changed the way auto-detection is performed on ports marked as pass through and made the issue apparent.

A pass through port is an additional PS/2 port used to connect a slave device to a master device that is using PS/2 to communicate with the host (so slave's PS/2 communication is tunneled over master's PS/2 link). "Synaptics PS/2 TouchPad Interfacing Guide" describes such a setup (PS/2 PASS-THROUGH OPTION section).

Since paz00's embedded controller is not connected to a PS/2 port itself, the PS/2 interface it exposes is not a pass-through one.

---
 drivers/staging/nvec/nvec_ps2.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -111,7 +111,7 @@ static int nvec_mouse_probe(struct platf
 	if (!ser_dev)
 		return -ENOMEM;
 
-	ser_dev->id.type = SERIO_PS_PSTHRU;
+	ser_dev->id.type = SERIO_8042;
 	ser_dev->write = ps2_sendcommand;
 	ser_dev->start = ps2_startstreaming;
 	ser_dev->stop = ps2_stopstreaming;

Patches currently in stable-queue which might be from [email protected] are

queue-4.8/revert-staging-nvec-ps2-change-serio-type-to-passthrough.patch queue-4.8/drivers-staging-nvec-remove-bogus-reset-command-for-ps-2-interface.patch