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

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Message-Id: <20200416.134854.89754180705215688.davem@davemloft.net>
Date:   Thu, 16 Apr 2020 13:48:54 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     f.fainelli@...il.com
Cc:     netdev@...r.kernel.org, olteanv@...il.com, peppe.cavallaro@...com,
        alexandre.torgue@...com, joabreu@...opsys.com, mripard@...nel.org,
        wens@...e.org, mcoquelin.stm32@...il.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] net: stmmac: dwmac-sunxi: Provide TX and RX fifo
 sizes

From: Florian Fainelli <f.fainelli@...il.com>
Date: Tue, 14 Apr 2020 15:39:52 -0700

> 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>

Applied and queued up for -stable, thanks.