On 11/12/2016 8:34 AM, Marion & Christophe JAILLET wrote:
> Hi,
>
> in commit 1bf40ada6290 ("amd-xgbe: Add support for clause 37
> auto-negotiation"), we can find:
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-common.h
> b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
> index 695e982..8bcf4ef 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-common.h
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-common.h
> [...]
> #define XGBE_AN_CL37_PCS_MODE_MASK 0x06
> #define XGBE_AN_CL37_PCS_MODE_BASEX 0x00
> #define XGBE_AN_CL37_PCS_MODE_SGMII 0x04
> #define XGBE_AN_CL37_TX_CONFIG_MASK 0x08
> [...]
>
> diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
> b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
> index d5bfbe4..723eb90 100644
> --- a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
> +++ b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c
> [...]
> /* Set up the Control register */
> reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL);
> reg &= XGBE_AN_CL37_TX_CONFIG_MASK;
> reg &= XGBE_AN_CL37_PCS_MODE_MASK;
> [...]
>
> the "reg &=" statements look spurious. The 2 constants being 0x06 and
> 0x08, the current code is equivalent to "reg = 0"
>
> It is likely that "reg |=" (or "reg &= ~") was expected here.
Yes, those should have been "reg &= ~". I didn't find this in my testing
because the register is all zeroes after reset. I'll submit a patch to
fix that.
Thanks,
Tom
>
> Best regards,
> CJ
>
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