[U-Boot] [RFC] net/e1000: Fix EEPROM access error

[Marek Vasut <marex@denx.de>]

On Friday, October 17, 2014 at 10:44:06 PM, York Sun wrote:
> Commit 951860634fdb557bbb58e0f99215391bc0c29779 may have changed
> the logic unintentially from "if (!(swfw_sync & (fwmask | swmask)))"
> to "if ((swfw_sync & swmask) && !(swfw_sync & fwmask))". This change
> breaks some e1000 NIC with a message "ERROR: Unable to read EEPROM!".
> 
> Signed-off-by: York Sun <yorksun@freescale.com>
> CC: Marek Vasut <marex@denx.de>
> CC: Tim Harvey <tharvey@gateworks.com>
> ---
> Marek, please take a look at this change. I have no knowledge about
> e1000 driver. So I don't know if the original change was intended.
> Reverting this change fixes the problem I have on my board.
> 
>  drivers/net/e1000.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/e1000.c b/drivers/net/e1000.c
> index 6e8765c..b092867 100644
> --- a/drivers/net/e1000.c
> +++ b/drivers/net/e1000.c
> @@ -1113,7 +1113,7 @@ e1000_swfw_sync_acquire(struct e1000_hw *hw, uint16_t
> mask) return -E1000_ERR_SWFW_SYNC;
> 
>  		swfw_sync = E1000_READ_REG(hw, SW_FW_SYNC);
> -		if ((swfw_sync & swmask) && !(swfw_sync & fwmask))
> +		if (!(swfw_sync & (fwmask | swmask)))
>  			break;
> 
>  		/* firmware currently using resource (fwmask) */

+CC Marcel. Marcel, can you please take a look at this and test this with i210 
card ?

Thanks!

Best regards,
Marek Vasut