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Date: Fri, 10 Aug 2018 10:40:55 +0800 From: Jisheng Zhang <Jisheng.Zhang@...aptics.com> To: Andrew Lunn <andrew@...n.ch> Cc: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>, "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Marek BehĂșn <marek.behun@....cz>, Tomas Hlavacek <tomas.hlavacek@....cz>, linux-arm-kernel@...ts.infradead.org Subject: Re: [PATCH] net: mvneta: use the correct napi pointer Hi, On Thu, 9 Aug 2018 14:13:08 +0200 Andrew Lunn wrote: > On Thu, Aug 09, 2018 at 08:02:42PM +0800, Jisheng Zhang wrote: > > if neta_armada3700 is true, the mvneta_pcpu_port's napi is invalid, we > > should use pp->napi instead. Fix mvneta_config_rss() with this method. > > Although we can fix mvneta_rx_hwbm() and mvneta_rx_swbm() in the same > > manner, the napi parm of mvneta_poll() is always correct, so we can > > pass the correct napi param to mvneta_rx_hwbm() and mvneta_rx_swbm() > > > > Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com> > > Hi Jisheng > > How does this differ from oops, I didn't monitor the net-next tree recently, glad to see it's fixed. But the mvneta_config_rss() also need the fix. Since your patch is already merged, so I will submit one separate patch to fix mvneta_config_rss(). Thanks a lot, Jisheng > > commit 7a86f05faf112463cfbbdfd222012e247de461a1 > Author: Andrew Lunn <andrew@...n.ch> > Date: Wed Jul 18 18:10:50 2018 +0200 > > net: ethernet: mvneta: Fix napi structure mixup on armada 3700 > > The mvneta Ethernet driver is used on a few different Marvell SoCs. > Some SoCs have per cpu interrupts for Ethernet events. Some SoCs have > a single interrupt, independent of the CPU. The driver handles this by > having a per CPU napi structure when there are per CPU interrupts, and > a global napi structure when there is a single interrupt. > > When the napi core calls mvneta_poll(), it passes the napi > instance. This was not being propagated through the call chain, and > instead the per-cpu napi instance was passed to napi_gro_receive() > call. This breaks when there is a single global napi instance. > > Signed-off-by: Andrew Lunn <andrew@...n.ch> > Fixes: 2636ac3cc2b4 ("net: mvneta: Add network support for Armada 3700 SoC") > Signed-off-by: Gregory CLEMENT <gregory.clement@...tlin.com> > Signed-off-by: David S. Miller <davem@...emloft.net> > > which is already in net-next, and i hope net? > > Andrew
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