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Date:   Fri, 15 Mar 2019 09:50:15 +0000
From:   Jose Abreu <>
To:     Aaro Koskinen <>,
        "David S. Miller" <>,
        Giuseppe Cavallaro <>,
        Alexandre Torgue <>,
        Jose Abreu <>,
        Thor Thayer <>,
        <>, <>
CC:     Aaro Koskinen <>
Subject: Re: [PATCH 2/2] net: stmmac: fix jumbo frame sending with non-linear

On 3/14/2019 7:43 PM, Aaro Koskinen wrote:
> From: Aaro Koskinen <>
> When sending non-linear skbs with jumbo frames, we set up the non-paged
> data and mark that as a last segment, although the paged fragments are
> also prepared. This will stall the TX queue and trigger a watchdog warning
> (a simple reproducer is to run an iperf client mode TCP test with a large
> MTU - networking fails instantly).
> Fix by checking if the skb is non-linear.
> Signed-off-by: Aaro Koskinen <>

Acked-by: Jose Abreu <>

Jose Miguel Abreu

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