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can: c_can: Simplify buffer reenabling

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Instead of writing to the message object we can simply clear the
NewDat bit with the get method.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Thomas Gleixner 2014-04-11 08:13:14 +00:00 committed by Marc Kleine-Budde
parent 1da394d889
commit 6b48ff8d93
1 changed files with 6 additions and 10 deletions
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16
drivers/net/can/c_can/c_can.c
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@ -108,6 +108,7 @@
#define IF_COMM_CONTROL BIT(4)
#define IF_COMM_CLR_INT_PND BIT(3)
#define IF_COMM_TXRQST BIT(2)
#define IF_COMM_CLR_NEWDAT IF_COMM_TXRQST
#define IF_COMM_DATAA BIT(1)
#define IF_COMM_DATAB BIT(0)
#define IF_COMM_ALL (IF_COMM_MASK | IF_COMM_ARB | \
@ -120,7 +121,7 @@
IF_COMM_DATAA | IF_COMM_DATAB)
/* For the high buffers we clear the interrupt bit and newdat */
#define IF_COMM_RCV_HIGH (IF_COMM_RCV_LOW | IF_COMM_TXRQST)
#define IF_COMM_RCV_HIGH (IF_COMM_RCV_LOW | IF_COMM_CLR_NEWDAT)
/* IFx arbitration */
#define IF_ARB_MSGVAL BIT(15)
@ -353,17 +354,12 @@ static void c_can_write_msg_object(struct net_device *dev,
}
static inline void c_can_activate_all_lower_rx_msg_obj(struct net_device *dev,
int iface,
int ctrl_mask)
int iface)
{
int i;
struct c_can_priv *priv = netdev_priv(dev);
for (i = C_CAN_MSG_OBJ_RX_FIRST; i <= C_CAN_MSG_RX_LOW_LAST; i++) {
priv->write_reg(priv, C_CAN_IFACE(MSGCTRL_REG, iface),
ctrl_mask & ~IF_MCONT_NEWDAT);
c_can_object_put(dev, iface, i, IF_COMM_CONTROL);
}
for (i = C_CAN_MSG_OBJ_RX_FIRST; i <= C_CAN_MSG_RX_LOW_LAST; i++)
c_can_object_get(dev, iface, i, IF_COMM_CLR_NEWDAT);
}
static int c_can_handle_lost_msg_obj(struct net_device *dev,
@ -829,7 +825,7 @@ static int c_can_read_objects(struct net_device *dev, struct c_can_priv *priv,
if (obj == C_CAN_MSG_RX_LOW_LAST)
/* activate all lower message objects */
c_can_activate_all_lower_rx_msg_obj(dev, IF_RX, ctrl);
c_can_activate_all_lower_rx_msg_obj(dev, IF_RX);
pkts++;
quota--;