Patch "serial: imx: Fix DCD reading" 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

serial: imx: Fix DCD reading

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:
serial-imx-fix-dcd-reading.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: Sascha Hauer <[email protected]>
Date: Mon, 26 Sep 2016 15:55:31 +0200
Subject: serial: imx: Fix DCD reading
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From: Sascha Hauer <[email protected]>

commit 4b75f80003617fe35771a9e27022e8fbd6a41875 upstream.

The USR2_DCDIN bit is tested for in register usr1. As the name suggests the usr2 register should be used instead. This fixes reading the Carrier detect status.

---
 drivers/tty/serial/imx.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

@@ -740,12 +740,13 @@ static unsigned int imx_get_hwmctrl(stru
 {
 	unsigned int tmp = TIOCM_DSR;
 	unsigned usr1 = readl(sport->port.membase + USR1);
+	unsigned usr2 = readl(sport->port.membase + USR2);
 
 	if (usr1 & USR1_RTSS)
 		tmp |= TIOCM_CTS;
 
 	/* in DCE mode DCDIN is always 0 */
-	if (!(usr1 & USR2_DCDIN))
+	if (!(usr2 & USR2_DCDIN))
 		tmp |= TIOCM_CAR;
 
 	if (sport->dte_mode)

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

queue-4.8/serial-imx-fix-dcd-reading.patch