[PATCH net-next-2.6 16/19 v5] can: EG20T PCH: Fix incorrect return processing
From: Tomoya MORINAGA <hidden>
Date: 2010-11-26 02:25:02
Subsystem:
can network drivers, the rest · Maintainers:
Marc Kleine-Budde, Vincent Mailhol, Linus Torvalds
Fix incorrect return processing Signed-off-by: Tomoya MORINAGA <redacted> --- drivers/net/can/pch_can.c | 19 ++++++++++--------- 1 files changed, 10 insertions(+), 9 deletions(-)
diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c
index e2132b7..1675045 100644
--- a/drivers/net/can/pch_can.c
+++ b/drivers/net/can/pch_can.c@@ -586,9 +586,11 @@ 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; }
@@ -682,8 +684,10 @@ 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);
@@ -744,8 +748,8 @@ 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)
@@ -774,10 +778,7 @@ 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 */
@@ -788,7 +789,7 @@ 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)
--
1.6.0.6