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[ARM] Fix AMBA serial drivers for non-first serial ports

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Using console=ttyAM1 or console=ttyAMA1 resulted in an oops during
boot due to trying to drive the console before that port had been
registered.  Fix this by checking whether the port is present before
allowing console setup to proceed.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2007-01-22 18:59:42 +00:00 committed by Russell King
parent 7f215abc69
commit d28122a587
2 changed files with 4 additions and 0 deletions
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2
drivers/serial/amba-pl010.c
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@ -589,6 +589,8 @@ static int __init pl010_console_setup(struct console *co, char *options)
*/
if (co->index >= UART_NR)
co->index = 0;
if (!amba_ports[co->index])
return -ENODEV;
port = &amba_ports[co->index]->port;
if (options)

2
drivers/serial/amba-pl011.c
View File

@ -661,6 +661,8 @@ static int __init pl011_console_setup(struct console *co, char *options)
if (co->index >= UART_NR)
co->index = 0;
uap = amba_ports[co->index];
if (!uap)
return -ENODEV;
uap->port.uartclk = clk_get_rate(uap->clk);