netdev - Re: [PATCH net-next v1 1/1] net: fec: Fix RMON registers on imx6

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Date:	Mon, 1 Jul 2013 14:52:59 +0100
From:	Jim Baxter <jim_baxter@...tor.com>
To:	Chris Healy <cphealy@...il.com>
CC:	"David S. Miller" <davem@...emloft.net>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Frank Li <Frank.Li@...escale.com>,
	Fugang Duan <B38611@...escale.com>,
	Joe Perches <joe@...ches.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next v1 1/1] net: fec: Fix RMON registers on imx6

On 01/07/13 14:42, Chris Healy wrote:
> The comment one line up should change to reflect the functional change. 
> Something like:  "Enable the MIB logic"
> 
> 
> On Mon, Jul 1, 2013 at 3:31 AM, Jim Baxter <jim_baxter@...tor.com
> <mailto:jim_baxter@...tor.com>> wrote:
> 
>     commit 38ae92d "fec: Add support for reading
>     RMON registers" causes the imx6Q to crash.
> 
>     This fixes it by only enabling the RMON registers, the
>     registers are already cleared by the MAC being reset.
> 
>     Signed-off-by: Jim Baxter <jim_baxter@...tor.com
>     <mailto:jim_baxter@...tor.com>>
>     ---
>     Change v1 to v2
>     Removed per processor change and just set bit 31 to 0.
> 
>      drivers/net/ethernet/freescale/fec_main.c |    5 +----
>      1 file changed, 1 insertion(+), 4 deletions(-)
> 
>     diff --git a/drivers/net/ethernet/freescale/fec_main.c
>     b/drivers/net/ethernet/freescale/fec_main.c
>     index ed6180e..c772df1 100644
>     --- a/drivers/net/ethernet/freescale/fec_main.c
>     +++ b/drivers/net/ethernet/freescale/fec_main.c
>     @@ -606,10 +606,7 @@ fec_restart(struct net_device *ndev, int duplex)
> 
>      #ifndef CONFIG_M5272
>             /* Disable, clear, and enable the MIB */
>     -       writel(1 << 31, fep->hwp + FEC_MIB_CTRLSTAT);
>     -       for (i = RMON_T_DROP; i < IEEE_R_OCTETS_OK; i++)
>     -               writel(0, fep->hwp + i);
>     -       writel(0, fep->hwp + FEC_MIB_CTRLSTAT);
>     +       writel(0 << 31, fep->hwp + FEC_MIB_CTRLSTAT);
>      #endif
> 
>             /* And last, enable the transmit and receive processing */
>     --
>     1.7.10.4
> 
> 

Hi Chris,
Does "Enable the MIB statistic event counters" sound OK?

Thank you,
Jim


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