linux-kernel - Re: [PATCH] net: stmmac: fix incorrect bit set in gmac4 mdio addr register

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Message-ID: <8361c024-3afe-f048-0cf6-d029d1a075d2@synopsys.com>
Date:   Tue, 27 Dec 2016 12:11:49 +0000
From:   Joao Pinto <Joao.Pinto@...opsys.com>
To:     "Kweh, Hock Leong" <hock.leong.kweh@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        "Giuseppe CAVALLARO" <peppe.cavallaro@...com>,
        <seraphin.bonnaffe@...com>, <f.fainelli@...il.com>
CC:     Alexandre TORGUE <alexandre.torgue@...il.com>,
        Joachim Eastwood <manabian@...il.com>,
        Niklas Cassel <niklas.cassel@...s.com>,
        Johan Hovold <johan@...nel.org>, <pavel@....cz>,
        Ong Boon Leong <boon.leong.ong@...el.com>,
        <weifeng.voon@...el.com>, <lars.persson@...s.com>,
        netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: stmmac: fix incorrect bit set in gmac4 mdio addr
 register

Às 8:07 PM de 12/27/2016, Kweh, Hock Leong escreveu:
> From: "Kweh, Hock Leong" <hock.leong.kweh@...el.com>
> 
> Fixing the gmac4 mdio write access to use MII_GMAC4_WRITE only instead of
> OR together with MII_WRITE.
> 
> Signed-off-by: Kweh, Hock Leong <hock.leong.kweh@...el.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c |    4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
> index fda01f7..b0344c2 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
> @@ -116,7 +116,7 @@ static int stmmac_mdio_write(struct mii_bus *bus, int phyaddr, int phyreg,
>  	unsigned int mii_address = priv->hw->mii.addr;
>  	unsigned int mii_data = priv->hw->mii.data;
>  
> -	u32 value = MII_WRITE | MII_BUSY;
> +	u32 value = MII_BUSY;
>  
>  	value |= (phyaddr << priv->hw->mii.addr_shift)
>  		& priv->hw->mii.addr_mask;
> @@ -126,6 +126,8 @@ static int stmmac_mdio_write(struct mii_bus *bus, int phyaddr, int phyreg,
>  		& priv->hw->mii.clk_csr_mask;
>  	if (priv->plat->has_gmac4)
>  		value |= MII_GMAC4_WRITE;
> +	else
> +		value |= MII_WRITE;
>  
>  	/* Wait until any existing MII operation is complete */
>  	if (stmmac_mdio_busy_wait(priv->ioaddr, mii_address))
> 

Acked-By: Joao Pinto <jpinto@...opsys.com>