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can: kvaser_usb: Don't dereference skb after a netif_rx() 

We should not touch the packet after a netif_rx: it might
get freed behind our back.

Suggested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Ahmed S. Darwish <ahmed.darwish@valeo.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Ahmed S. Darwish 2015-01-11 15:49:52 -05:00 committed by Marc Kleine-Budde
parent 5e7e6e0c9b
commit a58518ccf3
1 changed files with 4 additions and 7 deletions
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11
drivers/net/can/usb/kvaser_usb.c
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@ -520,10 +520,10 @@ static void kvaser_usb_tx_acknowledge(const struct kvaser_usb *dev,
skb = alloc_can_err_skb(priv->netdev, &cf);
if (skb) {
cf->can_id |= CAN_ERR_RESTARTED;
netif_rx(skb);
stats->rx_packets++;
stats->rx_bytes += cf->can_dlc;
netif_rx(skb);
} else {
netdev_err(priv->netdev,
"No memory left for err_skb\n");
@ -770,10 +770,9 @@ static void kvaser_usb_rx_error(const struct kvaser_usb *dev,
priv->can.state = new_state;
netif_rx(skb);
stats->rx_packets++;
stats->rx_bytes += cf->can_dlc;
netif_rx(skb);
}
static void kvaser_usb_rx_can_err(const struct kvaser_usb_net_priv *priv,
@ -805,10 +804,9 @@ static void kvaser_usb_rx_can_err(const struct kvaser_usb_net_priv *priv,
stats->rx_over_errors++;
stats->rx_errors++;
netif_rx(skb);
stats->rx_packets++;
stats->rx_bytes += cf->can_dlc;
netif_rx(skb);
}
}
@ -887,10 +885,9 @@ static void kvaser_usb_rx_can_msg(const struct kvaser_usb *dev,
cf->can_dlc);
}
netif_rx(skb);
stats->rx_packets++;
stats->rx_bytes += cf->can_dlc;
netif_rx(skb);
}
static void kvaser_usb_start_chip_reply(const struct kvaser_usb *dev,