netdev - Re: [PATCH net] net: stmmac: dwmac-sunxi: Provide TX and RX fifo sizes

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Message-ID: <CAGb2v65XwJ30_g1qf5a=1LR63BZ=DEq0qG9GQae0YuZfH1C79g@mail.gmail.com>
Date:   Wed, 15 Apr 2020 13:41:47 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     netdev <netdev@...r.kernel.org>, olteanv@...il.com,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S. Miller" <davem@...emloft.net>,
        Maxime Ripard <mripard@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        "moderated list:ARM/Allwinner sunXi SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/STM32 ARCHITECTURE" 
        <linux-stm32@...md-mailman.stormreply.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net] net: stmmac: dwmac-sunxi: Provide TX and RX fifo sizes

On Wed, Apr 15, 2020 at 6:40 AM Florian Fainelli <f.fainelli@...il.com> wrote:
>
> After commit bfcb813203e619a8960a819bf533ad2a108d8105 ("net: dsa:
> configure the MTU for switch ports") my Lamobo R1 platform which uses
> an allwinner,sun7i-a20-gmac compatible Ethernet MAC started to fail
> by rejecting a MTU of 1536. The reason for that is that the DMA
> capabilities are not readable on this version of the IP, and there
> is also no 'tx-fifo-depth' property being provided in Device Tree. The
> property is documented as optional, and is not provided.
>
> Chen-Yu indicated that the FIFO sizes are 4KB for TX and 16KB for RX, so
> provide these values through platform data as an immediate fix until
> various Device Tree sources get updated accordingly.
>
> Fixes: eaf4fac47807 ("net: stmmac: Do not accept invalid MTU values")
> Suggested-by: Chen-Yu Tsai <wens@...e.org>
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>

Acked-by: Chen-Yu Tsai <wens@...e.org>