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OMAP3: serial: Check for zero-based physical addr 

This is for protecting a wrong mapping attempt of a zero-based
physical address.

The result is that, no serial port will be attempted to be mapped.

Also add an additional protection for NULL clocks before attempting
to enable them (if above condition applies)

Signed-off-by: Sergio Aguirre <saaguirre@ti.com>
This commit is contained in:
Sergio Aguirre 2010-02-27 14:13:43 -06:00
parent 29b2ee5af5
commit e88d556dc5
1 changed files with 13 additions and 0 deletions
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13
arch/arm/mach-omap2/serial.c
View File

@ -664,6 +664,12 @@ void __init omap_serial_early_init(void)
struct device *dev = &pdev->dev;
struct plat_serial8250_port *p = dev->platform_data;
/* Don't map zero-based physical address */
if (p->mapbase == 0) {
printk(KERN_WARNING "omap serial: No physical address"
" for uart#%d, so skipping early_init...\n", i);
continue;
}
/*
* Module 4KB + L4 interconnect 4KB
* Static mapping, never released
@ -727,6 +733,13 @@ void __init omap_serial_init_port(int port)
pdev = &uart->pdev;
dev = &pdev->dev;
/* Don't proceed if there's no clocks available */
if (unlikely(!uart->ick || !uart->fck)) {
WARN(1, "%s: can't init uart%d, no clocks available\n",
kobject_name(&dev->kobj), port);
return;
}
omap_uart_enable_clocks(uart);
omap_uart_reset(uart);