[PATCH] tty: serial: vt8500: fix return value check in vt8500_serial_probe()

[Tony Prisk]

On Sun, 2012-12-02 at 05:10 -0500, Wei Yongjun wrote:
> From: Wei Yongjun <yongjun_wei at trendmicro.com.cn>
> 
> In case of error, function of_clk_get() returns ERR_PTR()
> and never returns NULL. The NULL test in the return value
> check should be replaced with IS_ERR().
> 
> Signed-off-by: Wei Yongjun <yongjun_wei at trendmicro.com.cn>
> ---
>  drivers/tty/serial/vt8500_serial.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/vt8500_serial.c b/drivers/tty/serial/vt8500_serial.c
> index 205d4cf..f528cc2 100644
> --- a/drivers/tty/serial/vt8500_serial.c
> +++ b/drivers/tty/serial/vt8500_serial.c
> @@ -604,7 +604,7 @@ static int __devinit vt8500_serial_probe(struct platform_device *pdev)
>  	vt8500_port->uart.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
>  
>  	vt8500_port->clk = of_clk_get(pdev->dev.of_node, 0);
> -	if (vt8500_port->clk) {
> +	if (!IS_ERR(vt8500_port->clk)) {
>  		vt8500_port->uart.uartclk = clk_get_rate(vt8500_port->clk);
>  	} else {
>  		/* use the default of 24Mhz if not specified and warn */
> 

Acked-by: Tony Prisk <linux at prisktech.co.nz>