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pch_can: Divide poll function

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To easy to read/understand, divide poll function into two sub-functions.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tomoya 2010-12-12 20:24:08 +00:00 committed by David S. Miller
parent 76d94b2329
commit e489ccebf1
1 changed files with 35 additions and 36 deletions
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99
drivers/net/can/pch_can.c
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@ -819,72 +819,71 @@ RX_NEXT:
return rcv_pkts;
}
static int pch_can_rx_poll(struct napi_struct *napi, int quota)
static void pch_can_tx_complete(struct net_device *ndev, u32 int_stat)
{
struct net_device *ndev = napi->dev;
struct pch_can_priv *priv = netdev_priv(ndev);
struct net_device_stats *stats = &(priv->ndev->stats);
u32 dlc;
u32 int_stat;
int rcv_pkts = 0;
u32 reg_stat;
int_stat = pch_can_int_pending(priv);
if (!int_stat)
return 0;
INT_STAT:
if (int_stat == PCH_STATUS_INT) {
reg_stat = ioread32(&priv->regs->stat);
if (reg_stat & (PCH_BUS_OFF | PCH_LEC_ALL)) {
if ((reg_stat & PCH_LEC_ALL) != PCH_LEC_ALL)
pch_can_error(ndev, reg_stat);
}
if (reg_stat & PCH_TX_OK) {
iowrite32(PCH_CMASK_RX_TX_GET,
&priv->regs->ifregs[1].cmask);
pch_can_check_if_busy(&priv->regs->ifregs[1].creq,
ioread32(&priv->regs->intr));
pch_can_bit_clear(&priv->regs->stat, PCH_TX_OK);
}
if (reg_stat & PCH_RX_OK)
pch_can_bit_clear(&priv->regs->stat, PCH_RX_OK);
int_stat = pch_can_int_pending(priv);
if (int_stat == PCH_STATUS_INT)
goto INT_STAT;
}
MSG_OBJ:
if ((int_stat >= PCH_RX_OBJ_START) && (int_stat <= PCH_RX_OBJ_END)) {
rcv_pkts = pch_can_rx_normal(ndev, int_stat);
if (rcv_pkts < 0)
return 0;
} else if ((int_stat >= PCH_TX_OBJ_START) &&
(int_stat <= PCH_TX_OBJ_END)) {
/* Handle transmission interrupt */
can_get_echo_skb(ndev, int_stat - PCH_RX_OBJ_END - 1);
iowrite32(PCH_CMASK_RX_TX_GET | PCH_CMASK_CLRINTPND,
&priv->regs->ifregs[1].cmask);
dlc = ioread32(&priv->regs->ifregs[1].mcont) &
PCH_IF_MCONT_DLC;
pch_can_check_if_busy(&priv->regs->ifregs[1].creq, int_stat);
if (dlc > 8)
dlc = 8;
dlc = get_can_dlc(ioread32(&priv->regs->ifregs[1].mcont) &
PCH_IF_MCONT_DLC);
stats->tx_bytes += dlc;
stats->tx_packets++;
if (int_stat == PCH_TX_OBJ_END)
netif_wake_queue(ndev);
}
int_stat = pch_can_int_pending(priv);
if (int_stat == PCH_STATUS_INT)
goto INT_STAT;
else if (int_stat >= 1 && int_stat <= 32)
goto MSG_OBJ;
static int pch_can_rx_poll(struct napi_struct *napi, int quota)
{
struct net_device *ndev = napi->dev;
struct pch_can_priv *priv = netdev_priv(ndev);
u32 int_stat;
int rcv_pkts = 0;
u32 reg_stat;
int_stat = pch_can_int_pending(priv);
if (!int_stat)
goto end;
if ((int_stat == PCH_STATUS_INT) && (quota > 0)) {
reg_stat = ioread32(&priv->regs->stat);
if (reg_stat & (PCH_BUS_OFF | PCH_LEC_ALL)) {
if (reg_stat & PCH_BUS_OFF ||
(reg_stat & PCH_LEC_ALL) != PCH_LEC_ALL) {
pch_can_error(ndev, reg_stat);
quota--;
}
}
if (reg_stat & PCH_TX_OK)
pch_can_bit_clear(&priv->regs->stat, PCH_TX_OK);
if (reg_stat & PCH_RX_OK)
pch_can_bit_clear(&priv->regs->stat, PCH_RX_OK);
int_stat = pch_can_int_pending(priv);
}
if (quota == 0)
goto end;
if ((int_stat >= PCH_RX_OBJ_START) && (int_stat <= PCH_RX_OBJ_END)) {
rcv_pkts += pch_can_rx_normal(ndev, int_stat);
quota -= rcv_pkts;
if (quota < 0)
goto end;
} else if ((int_stat >= PCH_TX_OBJ_START) &&
(int_stat <= PCH_TX_OBJ_END)) {
/* Handle transmission interrupt */
pch_can_tx_complete(ndev, int_stat);
}
end:
napi_complete(napi);
pch_can_set_int_enables(priv, PCH_CAN_ALL);