diff options
| author | Arvind Yadav <arvind.yadav.cs@gmail.com> | 2017-01-19 13:30:44 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-19 14:20:23 +0100 |
| commit | 2cc32b18d1243d65dc312478be08dd5856b44523 (patch) | |
| tree | eecf3cef1b71453cd6d04309839bfdccf50cfcbe /drivers/tty/serial/8250/8250_gsc.c | |
| parent | 28ec9570a22fcf42d5154f6a48dc5b2afdd8d9a3 (diff) | |
tty: serial: 8250: 8250_gsc:- Handle return NULL error from ioremap_nocache
Here, If ioremap_nocache will fail. It will return NULL.
Kernel can run into a NULL-pointer dereference.
This error check will avoid NULL pointer dereference.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250/8250_gsc.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_gsc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_gsc.c b/drivers/tty/serial/8250/8250_gsc.c index b1e6ae9f1ff9..63306de4390d 100644 --- a/drivers/tty/serial/8250/8250_gsc.c +++ b/drivers/tty/serial/8250/8250_gsc.c @@ -60,6 +60,10 @@ static int __init serial_init_chip(struct parisc_device *dev) 7272727 : 1843200; uart.port.mapbase = address; uart.port.membase = ioremap_nocache(address, 16); + if (!uart.port.membase) { + dev_warn(&dev->dev, "Failed to map memory\n"); + return -ENOMEM; + } uart.port.irq = dev->irq; uart.port.flags = UPF_BOOT_AUTOCONF; uart.port.dev = &dev->dev; |