Patch "serial: 8250_mid: fix divide error bug if baud rate is 0" has been added to the 4.4-stable tree

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

serial: 8250_mid: fix divide error bug if baud rate is 0

to the 4.4-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_mid-fix-divide-error-bug-if-baud-rate-is-0.patch

and it can be found in the queue-4.4 subdirectory.

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

From: Andy Shevchenko <[email protected]>
Date: Fri, 1 Jul 2016 17:21:49 +0300
Subject: serial: 8250_mid: fix divide error bug if baud rate is 0

From: Andy Shevchenko <[email protected]>

commit 47b34d2ef266e2c283b514d65c8963c2ccd42474 upstream.

Since the commit c1a67b48f6a5 ("serial: 8250_pci: replace switch-case by formula for Intel MID"), the 8250 driver crashes in the byt_set_termios() function with a divide error. This is caused by the fact that a baud rate of 0 (B0) is not handled properly. Fix it by falling back to B9600 in this case.

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

@@ -149,6 +149,9 @@ static void mid8250_set_termios(struct u
 	unsigned long w = BIT(24) - 1;
 	unsigned long mul, div;
 
+	/* Gracefully handle the B0 case: fall back to B9600 */
+	fuart = fuart ? fuart : 9600 * 16;
+
 	if (mid->board->freq < fuart) {
 		/* Find prescaler value that satisfies Fuart < Fref */
 		if (mid->board->freq > baud)

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

queue-4.4/serial-8250_mid-fix-divide-error-bug-if-baud-rate-is-0.patch