netdev - Re: [PATCH 04/16] c_can: fix receive buffer configuration

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Date:	Mon, 09 Sep 2013 12:51:04 +0200
From:	Marc Kleine-Budde <mkl@...gutronix.de>
To:	Benedikt Spranger <b.spranger@...utronix.de>
CC:	netdev@...r.kernel.org,
	Alexander Frank <Alexander.Frank@...rspaecher.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Holger Dengler <dengler@...utronix.de>,
	"linux-can@...r.kernel.org" <linux-can@...r.kernel.org>
Subject: Re: [PATCH 04/16] c_can: fix receive buffer configuration

On 09/09/2013 09:25 AM, Benedikt Spranger wrote:
> The former implementation lacks some initialization of receive buffer.
> First the maximal buffer length was 0. The Buffer direction was not set
> and the mask register a reserverd flag was cleared.
> 
> Signed-off-by: Benedikt Spranger <b.spranger@...utronix.de>
> ---
>  drivers/net/can/c_can/c_can.c | 19 ++++++++++++++-----
>  1 file changed, 14 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c
> index bdb7bcd..886163f 100644
> --- a/drivers/net/can/c_can/c_can.c
> +++ b/drivers/net/can/c_can/c_can.c
> @@ -116,6 +116,11 @@
>  				IF_COMM_CONTROL | IF_COMM_TXRQST | \
>  				IF_COMM_DATAA | IF_COMM_DATAB)
>  
> +/* IFx mask */
> +#define IF_MASK_MXTD		BIT(31)
> +#define IF_MASK_MDIR		BIT(30)
> +#define IF_MASK_RES		BIT(29)
> +
>  /* IFx arbitration */
>  #define IF_ARB_MSGVAL		BIT(31)
>  #define IF_ARB_MSGXTD		BIT(30)
> @@ -653,11 +658,15 @@ static void c_can_configure_msg_objects(struct net_device *dev)
>  
>  	/* setup receive message objects */
>  	for (i = C_CAN_MSG_OBJ_RX_FIRST; i < C_CAN_MSG_OBJ_RX_LAST; i++)
> -		c_can_setup_receive_object(dev, 0, i, 0, 0,
> -			(IF_MCONT_RXIE | IF_MCONT_UMASK) & ~IF_MCONT_EOB);
> -
> -	c_can_setup_receive_object(dev, 0, C_CAN_MSG_OBJ_RX_LAST, 0, 0,
> -			IF_MCONT_EOB | IF_MCONT_RXIE | IF_MCONT_UMASK);
> +		c_can_setup_receive_object(dev, 0, i,
> +					   IF_MASK_MDIR | IF_MASK_RES, 0,
> +					   IF_MCONT_UMASK | IF_MCONT_RXIE |
> +					   IF_MCONT_DLC_MAX);

DLC_MAX should be added in this patch. not in 3.

> +
> +	c_can_setup_receive_object(dev, 0, C_CAN_MSG_OBJ_RX_LAST,
> +				   IF_MASK_MDIR | IF_MASK_RES, 0,
> +				   IF_MCONT_UMASK | IF_MCONT_EOB |
> +				   IF_MCONT_RXIE | IF_MCONT_DLC_MAX);
>  }
>  
>  /*
> 

Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
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