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serial: MIPS: lantiq: fix clock error check 

The clock should be checked with the proper IS_ERR() api before using it.

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
John Crispin 2013-08-09 20:54:31 +02:00 committed by Greg Kroah-Hartman
parent 7c658e6b46
commit 8ad2ee955b
1 changed files with 2 additions and 2 deletions
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4
drivers/tty/serial/lantiq.c
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@ -318,7 +318,7 @@ lqasc_startup(struct uart_port *port)
struct ltq_uart_port *ltq_port = to_ltq_uart_port(port);
int retval;
if (ltq_port->clk)
if (!IS_ERR(ltq_port->clk))
clk_enable(ltq_port->clk);
port->uartclk = clk_get_rate(ltq_port->fpiclk);
@ -386,7 +386,7 @@ lqasc_shutdown(struct uart_port *port)
port->membase + LTQ_ASC_RXFCON);
ltq_w32_mask(ASCTXFCON_TXFEN, ASCTXFCON_TXFFLU,
port->membase + LTQ_ASC_TXFCON);
if (ltq_port->clk)
if (!IS_ERR(ltq_port->clk))
clk_disable(ltq_port->clk);
}