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pch_can: Fix incorrect return processing 

Fix incorrect return processing.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Tomoya 2010-12-12 20:24:23 +00:00 committed by David S. Miller
parent a6f6d6b51b
commit 3332bc5446
1 changed files with 10 additions and 9 deletions
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19
drivers/net/can/pch_can.c
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@ -580,9 +580,11 @@ static irqreturn_t pch_can_interrupt(int irq, void *dev_id)
struct net_device *ndev = (struct net_device *)dev_id;
struct pch_can_priv *priv = netdev_priv(ndev);
if (!pch_can_int_pending(priv))
return IRQ_NONE;
pch_can_set_int_enables(priv, PCH_CAN_NONE);
napi_schedule(&priv->napi);
return IRQ_HANDLED;
}
@ -671,8 +673,10 @@ static int pch_can_rx_normal(struct net_device *ndev, u32 obj_num, int quota)
}
skb = alloc_can_skb(priv->ndev, &cf);
if (!skb)
return -ENOMEM;
if (!skb) {
netdev_err(ndev, "alloc_can_skb Failed\n");
return rcv_pkts;
}
/* Get Received data */
id2 = ioread32(&priv->regs->ifregs[0].id2);
@ -733,8 +737,8 @@ static int pch_can_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 quota_save = quota;
int_stat = pch_can_int_pending(priv);
if (!int_stat)
@ -763,10 +767,7 @@ static int pch_can_poll(struct napi_struct *napi, int quota)
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);
quota -= rcv_pkts;
if (quota < 0)
goto end;
quota -= pch_can_rx_normal(ndev, int_stat, quota);
} else if ((int_stat >= PCH_TX_OBJ_START) &&
(int_stat <= PCH_TX_OBJ_END)) {
/* Handle transmission interrupt */
@ -777,7 +778,7 @@ end:
napi_complete(napi);
pch_can_set_int_enables(priv, PCH_CAN_ALL);
return rcv_pkts;
return quota_save - quota;
}
static int pch_set_bittiming(struct net_device *ndev)