linux-kernel - Re: [PATCH net-next 4/6] r8169: add ERI functions

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Date:	Tue, 5 Jul 2011 20:55:45 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Hayes Wang <hayeswang@...ltek.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 4/6] r8169: add ERI functions

Hayes Wang <hayeswang@...ltek.com> :
[...]
> @@ -1046,6 +1046,49 @@ static u32 rtl_csi_read(void __iomem *ioaddr, int addr)
>  	return value;
>  }
>  
> +static
> +void rtl_eri_write(void __iomem *ioaddr, int addr, u32 mask, u32 val, int type)
> +{
> +	unsigned int i;
> +
> +	BUG_ON((addr & 3) || (mask == 0));
> +	RTL_W32(ERIDR, val);
> +	RTL_W32(ERIAR, ERIAR_WRITE_CMD | type | mask | addr);
> +
> +	for (i = 0; i < 100; i++) {
> +		udelay(100);
> +		if (!(RTL_R32(ERIAR) & ERIAR_FLAG))
> +			break;

I'd rather reverse those if possible : implicit posted write flushing read,
then udelay.

-- 
Ueimor
--
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