linux-kernel - [087/102] tty/serial: Fix XSCALE serial ports, e.g. ce4100

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Message-Id: <20110803221252.820068993@clark.kroah.org>
Date:	Wed, 03 Aug 2011 15:01:47 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Stephen Warren <swarren@...dia.com>
Subject: [087/102] tty/serial: Fix XSCALE serial ports, e.g. ce4100

3.0-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Stephen Warren <swarren@...dia.com>

commit 5568181f188ae9485a0cdbea5ea48f63d186a298 upstream.

Commit 4539c24fe4f92c09ee668ef959d3e8180df619b9 "tty/serial: Add
explicit PORT_TEGRA type" introduced separate flags describing the need
for IER bits UUE and RTOIE. Both bits are required for the XSCALE port
type. While that patch updated uart_config[] as required, the auto-probing
code wasn't updated to set the RTOIE flag when an XSCALE port type was
detected. This caused such ports to stop working. This patch rectifies
that.

Reported-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Tested-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Stephen Warren <swarren@...dia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/tty/serial/8250.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -1107,7 +1107,7 @@ static void autoconfig_16550a(struct uar
 			 */
 			DEBUG_AUTOCONF("Xscale ");
 			up->port.type = PORT_XSCALE;
-			up->capabilities |= UART_CAP_UUE;
+			up->capabilities |= UART_CAP_UUE | UART_CAP_RTOIE;
 			return;
 		}
 	} else {


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