netdev - Re: [PATCH] net: fec: stop the "rcv is not +last, " error messages

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Message-ID: <CAOMZO5B79aHocuqT4jgEU9gGcFYD5ZSDZh8PrGeXYAcLHW1x5Q@mail.gmail.com>
Date:	Wed, 30 Mar 2016 15:37:15 -0300
From:	Fabio Estevam <festevam@...il.com>
To:	Greg Ungerer <gerg@...inux.org>
Cc:	Troy Kisky <troy.kisky@...ndarydevices.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH] net: fec: stop the "rcv is not +last, " error messages

Hi Greg,

On Wed, Mar 30, 2016 at 12:24 AM, Greg Ungerer <gerg@...inux.org> wrote:
> Hi Troy,
>
> Commit 55cd48c8 ('net: fec: stop the "rcv is not +last, " error
> messages') adds a write to a register that is not present in all
> implementations of the FEC hardware module. None of the ColdFire
> SoC parts with the FEC module have the FTRL (0x1b0) register.
>
> Does this need a quirk flag to key access to this register of?
> Or can you piggyback on the FEC_QUIRK_HAS_RACC flag?

Would the change below work on Coldfire?

--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -943,8 +943,8 @@ fec_restart(struct net_device *ndev)
                else
                        val &= ~FEC_RACC_OPTIONS;
                writel(val, fep->hwp + FEC_RACC);
-       }
        writel(PKT_MAXBUF_SIZE, fep->hwp + FEC_FTRL);
+       }
 #endif

        /*