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>
git-mirror · Nov 6, 2014 · 5d14bba · 5d14bba
1 parent 398a9db
commit 5d14bba
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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,