From 5d14bba91d8c350b21d28834fab95f67a46a264e Mon Sep 17 00:00:00 2001
From: Aaron Sierra <asierra@xes-inc.com>
Date: Thu, 30 Oct 2014 19:49:52 -0500
Subject: [PATCH] serial: 8250_pci: Check mapping in pci_ni8430_init

Check the return value of ioremap_nocache to make sure we got a
valid mapping.

Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/8250/8250_pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 50f75703fd54e..003679fc884bf 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -757,6 +757,8 @@ pci_ni8430_setup(struct serial_private *priv,
 	offset += idx * board->uart_offset;
 
 	p = pci_ioremap_bar(dev, bar);
+	if (!p)
+		return -ENOMEM;
 
 	/* enable the transceiver */
 	writeb(readb(p + offset + NI8430_PORTCON) | NI8430_PORTCON_TXVR_ENABLE,
-- 
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