[PATCH 12/18] fec_imx: Impelemnt reset timeout

[Sascha Hauer]

On Tue, Feb 16, 2016 at 05:29:13PM -0800, Andrey Smirnov wrote:
> Don't wait for more than one second for IP block to finish resetting. If
> the block is dead it makes more sence to continue execution in hopes
> that the rest of the processor is fine, rather than spin indefinetly
> inside of the fec_probe function
> 
> Signed-off-by: Andrey Smirnov <andrew.smirnov at gmail.com>
> ---
>  drivers/net/fec_imx.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/net/fec_imx.c b/drivers/net/fec_imx.c
> index 46932fe..99bd179 100644
> --- a/drivers/net/fec_imx.c
> +++ b/drivers/net/fec_imx.c
> @@ -687,6 +687,7 @@ static int fec_probe(struct device_d *dev)
>  	int phy_reset;
>  	u32 msec = 1;
>  	struct resource *res;
> +	u64 start;
>  
>  	ret = dev_get_drvdata(dev, (const void **)&type);
>  	if (ret)
> @@ -739,9 +740,14 @@ static int fec_probe(struct device_d *dev)
>  	}
>  
>  	/* Reset chip. */
> +	start = get_time_ns();
>  	writel(FEC_ECNTRL_RESET, fec->regs + FEC_ECNTRL);
>  	while(readl(fec->regs + FEC_ECNTRL) & FEC_ECNTRL_RESET) {
>  		udelay(10);

While at it you can drop the udelay here.

Sascha


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