Patch "serial: 8250_fintek: Fix finding base_port with activated SuperIO" has been added to the 4.13-stable tree

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

serial: 8250_fintek: Fix finding base_port with activated SuperIO

to the 4.13-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:
serial-8250_fintek-fix-finding-base_port-with-activated-superio.patch
and it can be found in the queue-4.13 subdirectory.

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

From: "Ji-Ze Hong (Peter Hong)" <[email protected]>
Date: Tue, 17 Oct 2017 14:23:08 +0800
Subject: serial: 8250_fintek: Fix finding base_port with activated SuperIO

From: Ji-Ze Hong (Peter Hong) <[email protected]>

commit fd97e66c5529046e989a0879c3bb58fddb592c71 upstream.

The SuperIO will be configured at boot time by BIOS, but some BIOS will not deactivate the SuperIO when the end of configuration. It'll lead to mismatch for pdata->base_port in probe_setup_port(). So we'll deactivate all SuperIO before activate special base_port in fintek_8250_enter_key().

Tested on iBASE MI802.

---
 drivers/tty/serial/8250/8250_fintek.c |    3 +++
 1 file changed, 3 insertions(+)

@@ -118,6 +118,9 @@ static int fintek_8250_enter_key(u16 bas
 	if (!request_muxed_region(base_port, 2, "8250_fintek"))
 		return -EBUSY;
 
+	/* Force to deactive all SuperIO in this base_port */
+	outb(EXIT_KEY, base_port + ADDR_PORT);
+
 	outb(key, base_port + ADDR_PORT);
 	outb(key, base_port + ADDR_PORT);
 	return 0;

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

queue-4.13/serial-8250_fintek-fix-finding-base_port-with-activated-superio.patch