linux-kernel - Re: [PATCH 1/1] i40iw: remove bogus call to netdev_master_upper_dev

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Message-ID: <20200504185214.GA8086@ziepe.ca>
Date:   Mon, 4 May 2020 15:52:14 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     "Denis V. Lunev" <den@...nvz.org>
Cc:     Konstantin Khorenko <khorenko@...tuozzo.com>,
        Faisal Latif <faisal.latif@...el.com>,
        Shiraz Saleem <shiraz.saleem@...el.com>,
        Doug Ledford <dledford@...hat.com>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] i40iw: remove bogus call to
 netdev_master_upper_dev_get

On Tue, Apr 28, 2020 at 04:15:11PM +0300, Denis V. Lunev wrote:
> Local variable netdev is not used in these calls.
> 
> It should be noted, that this change is required to work in bonded mode.
> In the other case we would get the following assert:
>  "RTNL: assertion failed at net/core/dev.c (5665)"
> with the calltrace as follows:
> 	dump_stack+0x19/0x1b
> 	netdev_master_upper_dev_get+0x61/0x70
> 	i40iw_addr_resolve_neigh+0x1e8/0x220
> 	i40iw_make_cm_node+0x296/0x700
> 	? i40iw_find_listener.isra.10+0xcc/0x110
> 	i40iw_receive_ilq+0x3d4/0x810
> 	i40iw_puda_poll_completion+0x341/0x420
> 	i40iw_process_ceq+0xa5/0x280
> 	i40iw_ceq_dpc+0x1e/0x40
> 	tasklet_action+0x83/0x140
> 	__do_softirq+0x125/0x2bb
> 	call_softirq+0x1c/0x30
> 	do_softirq+0x65/0xa0
> 	irq_exit+0x105/0x110
> 	do_IRQ+0x56/0xf0
> 	common_interrupt+0x16a/0x16a
> 	? cpuidle_enter_state+0x57/0xd0
> 	cpuidle_idle_call+0xde/0x230
> 	arch_cpu_idle+0xe/0xc0
> 	cpu_startup_entry+0x14a/0x1e0
> 	start_secondary+0x1f7/0x270
> 	start_cpu+0x5/0x14
> 
> Signed-off-by: Denis V. Lunev <den@...nvz.org>
> CC: Konstantin Khorenko <khorenko@...tuozzo.com>
> CC: Faisal Latif <faisal.latif@...el.com>
> CC: Shiraz Saleem <shiraz.saleem@...el.com>
> CC: Doug Ledford <dledford@...hat.com>
> CC: Jason Gunthorpe <jgg@...pe.ca>
> CC: linux-rdma@...r.kernel.org
> CC: linux-kernel@...r.kernel.org
> Acked-by: Shiraz Saleem <shiraz.saleem@...el.com>
>  drivers/infiniband/hw/i40iw/i40iw_cm.c | 8 --------
>  1 file changed, 8 deletions(-)

Applied to for-rc, thanks

JAson