Commit 2cc32b18 authored by Arvind Yadav's avatar Arvind Yadav Committed by Greg Kroah-Hartman

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: default avatarArvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 28ec9570
...@@ -60,6 +60,10 @@ static int __init serial_init_chip(struct parisc_device *dev) ...@@ -60,6 +60,10 @@ static int __init serial_init_chip(struct parisc_device *dev)
7272727 : 1843200; 7272727 : 1843200;
uart.port.mapbase = address; uart.port.mapbase = address;
uart.port.membase = ioremap_nocache(address, 16); 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.irq = dev->irq;
uart.port.flags = UPF_BOOT_AUTOCONF; uart.port.flags = UPF_BOOT_AUTOCONF;
uart.port.dev = &dev->dev; uart.port.dev = &dev->dev;
......
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