netdev - Re: [PATCH] net: ll_temac: Fix DMA map size bug

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Message-ID: <55519867.2090205@xilinx.com>
Date:	Tue, 12 May 2015 08:06:31 +0200
From:	Michal Simek <michal.simek@...inx.com>
To:	Julia Lawall <julia.lawall@...6.fr>,
	Michal Simek <michal.simek@...inx.com>
CC:	<netdev@...r.kernel.org>,
	Sören Brinkmann <soren.brinkmann@...inx.com>,
	<monstr@...str.eu>, Fabian Frederick <fabf@...net.be>,
	<linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Manuel Schölling <manuel.schoelling@....de>,
	Markus Elfring <elfring@...rs.sourceforge.net>,
	Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@...inx.com>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] net: ll_temac: Fix DMA map size bug

On 05/12/2015 08:03 AM, Julia Lawall wrote:
> On Tue, 12 May 2015, Michal Simek wrote:
> 
>> DMA allocates skb->len instead of headlen
>> which is used for DMA.
>>
>> Signed-off-by: Michal Simek <michal.simek@...inx.com>
>> ---
>>
>>  drivers/net/ethernet/xilinx/ll_temac_main.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/xilinx/ll_temac_main.c b/drivers/net/ethernet/xilinx/ll_temac_main.c
>> index ca640d04fd93..cfb6bdb37fdc 100644
>> --- a/drivers/net/ethernet/xilinx/ll_temac_main.c
>> +++ b/drivers/net/ethernet/xilinx/ll_temac_main.c
>> @@ -705,8 +705,8 @@ static int temac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
>>  
>>  	cur_p->app0 |= STS_CTRL_APP0_SOP;
>>  	cur_p->len = skb_headlen(skb);
>> -	cur_p->phys = dma_map_single(ndev->dev.parent, skb->data, skb->len,
>> -				     DMA_TO_DEVICE);
>> +	cur_p->phys = dma_map_single(ndev->dev.parent, skb->data,
>> +				skb_headlen(skb), DMA_TO_DEVICE);
> 
> I think you could align the later arguments with the right side of the 
> parenthesis, as done in the original code.

Fixed and send v2.

Thanks,
Michal

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