netdev - Re: [PATCH net-next 1/1] net: fec: TX Buffer incorrectly initialized

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Message-ID: <5151C637.9010403@mentor.com>
Date:	Tue, 26 Mar 2013 16:00:55 +0000
From:	Jim Baxter <jim_baxter@...tor.com>
To:	unlisted-recipients:; (no To-header on input)
CC:	<netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 1/1] net: fec: TX Buffer incorrectly initialized

The field is the extended status control for the FEC network device, the
values written to it are used to set the hardware transmit and receive
state.
*From:* Eric Dumazet (eric.dumazet@...il.com) *Sent:* Tue, 26 Mar 2013
08:44:04 -0700 *To:* jim_baxter@...tor.com *Cc:* davem@...emloft.net,
Frank.Li@...escale.com, fabio.estevam@...escale.com,
netdev@...r.kernel.org *Subject:* Re: [PATCH net-next 1/1] net: fec: TX
Buffer incorrectly initialized
> On Tue, 2013-03-26 at 15:25 +0000, Jim Baxter wrote:
>> The TX Buffer in fec_enet_alloc_buffers was being initialized
>> with the receive register define BD_ENET_RX_INT instead of
>> the transmit register define BD_ENET_TX_INT
>>
>> Signed-off-by: Jim Baxter <jim_baxter@...tor.com>
>> ---
>>  drivers/net/ethernet/freescale/fec_main.c |    2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
>> index 3eb608f..2b78a1e 100644
>> --- a/drivers/net/ethernet/freescale/fec_main.c
>> +++ b/drivers/net/ethernet/freescale/fec_main.c
>> @@ -1391,7 +1391,7 @@ static int fec_enet_alloc_buffers(struct net_device *ndev)
>>  
>>  		if (fep->bufdesc_ex) {
>>  			struct bufdesc_ex *ebdp = (struct bufdesc_ex *)bdp;
>> -			ebdp->cbd_esc = BD_ENET_RX_INT;
>> +			ebdp->cbd_esc = BD_ENET_TX_INT;
>>  		}
>>  
>>  		bdp = fec_enet_get_nextdesc(bdp, fep->bufdesc_ex);
> 
> I am curious. What is the point having cbd_esc ?
> 
> Its a written only field.
> 
> 
> 
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