linux-kernel - Re: [PATCH] cxgb3: fix crash due to manipulating queues before registration

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Message-ID: <4CC919B1.1040602@chelsio.com>
Date:	Wed, 27 Oct 2010 23:35:29 -0700
From:	Divy Le Ray <divy@...lsio.com>
To:	Nishanth Aravamudan <nacc@...ibm.com>
CC:	eric.dumazet@...il.com, sonnyrao@...ibm.com,
	Dimitrios Michailidis <dm@...lsio.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cxgb3: fix crash due to manipulating queues before registration

On 10/27/2010 10:06 PM, Nishanth Aravamudan wrote:
> Hi Eric,
>
> Something like the following?:
>
> Thanks,
> Nish
>
>
> Along the same lines as "cxgb4: fix crash due to manipulating queues
> before registration" (8f6d9f40476895571df039b6f1f5230ec7faebad), before
> commit "net: allocate tx queues in register_netdevice"
> netif_tx_stop_all_queues and related functions could be used between
> device allocation and registration but now only after registration.
> cxgb4 has such a call before registration and crashes now.  Move it
> after register_netdev.
>
> Signed-off-by: Nishanth Aravamudan<nacc@...ibm.com>

Acked-by: Divy Le Ray <divy@...lsio.com>

> Cc: eric.dumazet@...il.com
> Cc: sonnyrao@...ibm.com
> Cc: Divy Le Ray<divy@...lsio.com>
> Cc: Dimitris Michailidis<dm@...lsio.com>
> Cc: netdev@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> ---
>   drivers/net/cxgb3/cxgb3_main.c |    2 +-
>   1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/net/cxgb3/cxgb3_main.c b/drivers/net/cxgb3/cxgb3_main.c
> index 4e3c123..96c70a5 100644
> --- a/drivers/net/cxgb3/cxgb3_main.c
> +++ b/drivers/net/cxgb3/cxgb3_main.c
> @@ -3301,7 +3301,6 @@ static int __devinit init_one(struct pci_dev *pdev,
>   		pi->rx_offload = T3_RX_CSUM | T3_LRO;
>   		pi->port_id = i;
>   		netif_carrier_off(netdev);
> -		netif_tx_stop_all_queues(netdev);
>   		netdev->irq = pdev->irq;
>   		netdev->mem_start = mmio_start;
>   		netdev->mem_end = mmio_start + mmio_len - 1;
> @@ -3342,6 +3341,7 @@ static int __devinit init_one(struct pci_dev *pdev,
>   				adapter->name = adapter->port[i]->name;
>
>   			__set_bit(i,&adapter->registered_device_map);
> +			 netif_tx_stop_all_queues(adapter->port[i]);
>   		}
>   	}
>   	if (!adapter->registered_device_map) {


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