netdev - Re: [PowerPC] Next May 8 boot failure: OOPS during ibmveth moduleinit

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Message-ID: <4A09309C.8000404@cn.fujitsu.com>
Date:	Tue, 12 May 2009 16:17:32 +0800
From:	Wei Yongjun <yjwei@...fujitsu.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
CC:	David Miller <davem@...emloft.net>,
	Sachin Sant <sachinp@...ibm.com>,
	Jiri Pirko <jpirko@...hat.com>, linux-next@...r.kernel.org,
	linuxppc-dev@...abs.org, netdev@...r.kernel.org
Subject: Re: [PowerPC] Next May 8 boot failure: OOPS during ibmveth moduleinit

Stephen Rothwell wrote:
> Hi Dave,
>
> This fixes it (I wonder if this bug is lurking in any other drivers):
>   

Yes, there are some other exists. This spatch script can help to found this.
(http://www.emn.fr/x-info/coccinelle/)

# cat netdev_dev_addr.cocci
@@
struct net_device *dev;
@@
memcpy(
- &dev->dev_addr
+ dev->dev_addr
, ...);

@@
struct net_device *dev;
expression E;
@@
memcpy(E,
- &dev->dev_addr
+ dev->dev_addr
, ...);

@@
expression E;
@@
- &E->dev_addr
+ E->dev_addr


> From: Stephen Rothwell <sfr@...b.auug.org.au>
> Date: Tue, 12 May 2009 17:24:02 +1000
> Subject: [PATCH] net/ibmveth: fix panic in probe
>
> netdev->dev_addr changed from being an array to being a pointer, so we
> should not take its address for memcpy().
>
> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> ---
>  drivers/net/ibmveth.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c
> index 7902e5e..8daffad 100644
> --- a/drivers/net/ibmveth.c
> +++ b/drivers/net/ibmveth.c
> @@ -1285,7 +1285,7 @@ static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_
>   	netdev->features |= NETIF_F_LLTX;
>  	spin_lock_init(&adapter->stats_lock);
>  
> -	memcpy(&netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
> +	memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
>  
>  	for(i = 0; i<IbmVethNumBufferPools; i++) {
>  		struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
>   

maybe this line should be fix too.


@@ -1368,7 +1368,7 @@ static void ibmveth_proc_unregister_driv
 static int ibmveth_show(struct seq_file *seq, void *v)
 {
 	struct ibmveth_adapter *adapter = seq->private;
-	char *current_mac = ((char*) &adapter->netdev->dev_addr);
+	char *current_mac = ((char*) adapter->netdev->dev_addr);
 	char *firmware_mac = ((char*) &adapter->mac_addr) ;
 
 	seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);


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