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serial: 8250_pci: Check mapping in pci_ni8430_init

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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>
This commit is contained in:
Aaron Sierra 2014-10-30 19:49:52 -05:00 committed by Greg Kroah-Hartman
parent 398a9db655
commit 5d14bba91d
1 changed files with 2 additions and 0 deletions
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2
drivers/tty/serial/8250/8250_pci.c
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@ -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,