From: David Miller <davem@davemloft.net>
To: u.kleine-koenig@pengutronix.de
Cc: netdev@vger.kernel.org, fabio.estevam@freescale.com,
Frank.Li@freescale.com, shawn.guo@linaro.org,
kernel@pengutronix.de, hector.palacios@digi.com,
tim.sander@hbm.com, rostedt@goodmis.org, tglx@linutronix.de,
stephen@networkplumber.org, B38611@freescale.com,
florian@openwrt.org, bhutchings@solarflare.com
Subject: Re: [PATCH] net/fec: Don't let ndo_start_xmit return NETDEV_TX_BUSY without link
Date: Tue, 30 Jul 2013 16:05:30 -0700 (PDT) [thread overview]
Message-ID: <20130730.160530.831845971567683172.davem@davemloft.net> (raw)
In-Reply-To: <1375176580-7368-1-git-send-email-u.kleine-koenig@pengutronix.de>
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Tue, 30 Jul 2013 11:29:40 +0200
> Don't test for having link and let hardware deal with this situation.
>
> Without this patch I see a machine running an -rt patched Linux being
> stuck in sch_direct_xmit when it looses link while there is still a
> packet to be sent. In this case the fec_enet_start_xmit routine returned
> NETDEV_TX_BUSY which makes the network stack reschedule the packet and
> so sch_direct_xmit calls fec_enet_start_xmit again.
> I failed to reproduce a complete hang without -rt, but I think the
> problem exists there, too.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Applied, thanks.
next prev parent reply other threads:[~2013-07-30 23:05 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-25 13:27 [PATCH] net/fec: call netif_carrier_off when not having link Uwe Kleine-König
2013-07-25 16:03 ` Stephen Hemminger
2013-07-26 9:35 ` Duan Fugang-B38611
2013-07-26 10:06 ` Florian Fainelli
2013-07-26 10:52 ` Sascha Hauer
2013-07-26 15:31 ` Ben Hutchings
2013-07-29 2:10 ` Duan Fugang-B38611
2013-07-29 2:14 ` Duan Fugang-B38611
2013-07-30 9:29 ` [PATCH] net/fec: Don't let ndo_start_xmit return NETDEV_TX_BUSY without link Uwe Kleine-König
2013-07-30 9:59 ` Duan Fugang-B38611
2013-07-30 23:05 ` David Miller [this message]
2013-07-31 8:16 ` Uwe Kleine-König
2013-07-31 18:51 ` David Miller
2013-08-01 2:01 ` Duan Fugang-B38611
2013-08-01 2:25 ` Steven Rostedt
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