From 5d14bba91d8c350b21d28834fab95f67a46a264e Mon Sep 17 00:00:00 2001 From: Aaron Sierra 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 Signed-off-by: Greg Kroah-Hartman --- 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 50f75703fd54..003679fc884b 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, -- 2.20.1