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can: cc770: store echo skb before starting the transfer 

On slow systems and high CAN bitrates, the error message
"can_put_echo_skb: BUG! echo_skb is occupied!" did show up because
can_put_echo_skb() was called after starting the transfer.

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Wolfgang Grandegger 2011-12-12 16:07:16 +01:00 committed by Marc Kleine-Budde
parent 6e9d554fa6
commit 7bb4db93ae
1 changed files with 3 additions and 1 deletions
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4
drivers/net/can/cc770/cc770.c
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@ -440,12 +440,14 @@ static netdev_tx_t cc770_start_xmit(struct sk_buff *skb, struct net_device *dev)
for (i = 0; i < dlc; i++)
cc770_write_reg(priv, msgobj[mo].data[i], cf->data[i]);
/* Store echo skb before starting the transfer */
can_put_echo_skb(skb, dev, 0);
cc770_write_reg(priv, msgobj[mo].ctrl1,
RMTPND_RES | TXRQST_SET | CPUUPD_RES | NEWDAT_UNC);
stats->tx_bytes += dlc;
can_put_echo_skb(skb, dev, 0);
/*
* HM: We had some cases of repeated IRQs so make sure the