netdev - Re: [PATCH v5] net: bnx2x: convert to hw

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Message-ID: <20110421224134.GB7888@rere.qmqm.pl>
Date:	Fri, 22 Apr 2011 00:41:34 +0200
From:	Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev@...r.kernel.org, Vladislav Zolotarov <vladz@...adcom.com>,
	Eilon Greenstein <eilong@...adcom.com>
Subject: Re: [PATCH v5] net: bnx2x: convert to hw_features

On Thu, Apr 21, 2011 at 04:52:11PM +0200, Eric Dumazet wrote:
> Le mardi 12 avril 2011 à 21:38 +0200, Michał Mirosław a écrit :
> > Since ndo_fix_features callback is postponing features change when
> > bp->recovery_state != BNX2X_RECOVERY_DONE, netdev_update_features()
> > has to be called again when this condition changes. Previously,
> > ethtool_ops->set_flags callback returned -EBUSY in that case
> > (it's not possible in the new model).
> > 
> > Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
> > 
> > v5: - don't delay set_features, as it's rtnl_locked - same as recovery process
> > v4: - complete bp->rx_csum -> NETIF_F_RXCSUM conversion
> >     - add check for failed ndo_set_features in ndo_open callback
> > v3: - include NETIF_F_LRO in hw_features
> >     - don't call netdev_update_features() if bnx2x_nic_load() failed
> > v2: - comment in ndo_fix_features callback
> > ---
> I am not sure its related to these changes, but I now have in
> net-next-2.6 :

> [   23.674263] ------------[ cut here ]------------
> [   23.674266] WARNING: at net/core/dev.c:1318 dev_disable_lro+0x83/0x90()
> [   23.674270] Hardware name: ProLiant BL460c G6
> [   23.674273] Modules linked in: tg3 libphy sg
> [   23.674280] Pid: 3070, comm: sysctl Tainted: G        W   2.6.39-rc2-01242-g3ef22b9-dirty #669
> [   23.674282] Call Trace:
> [   23.674285]  [<ffffffff813b94f3>] ? dev_disable_lro+0x83/0x90
> [   23.674291]  [<ffffffff81042c9b>] warn_slowpath_common+0x8b/0xc0
> [   23.674298]  [<ffffffff81042ce5>] warn_slowpath_null+0x15/0x20
> [   23.674304]  [<ffffffff813b94f3>] dev_disable_lro+0x83/0x90
> [   23.674309]  [<ffffffff81429789>] devinet_sysctl_forward+0x199/0x210
[...]

Hmm. Looks like something is not allowing to disable LRO. Please check with
following patch so we can be sure which driver causes this.

Best Regards,
Michał Mirosław
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