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can: janz-ican3: fix error and byte counters 

The error and byte counter statistics were being incremented
incorrectly. For example, a TX error would be counted both in tx_errors
and rx_errors.

This corrects the problem so that tx_errors and rx_errors are only
incremented for errors caused by packets sent to the bus. Error packets
generated by the driver are not counted.

The byte counters are only increased for packets which are actually
transmitted or received from the bus. Error packets generated by the
driver are not counted.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Ira W. Snyder 2012-07-19 08:54:18 -07:00 committed by Marc Kleine-Budde
parent 9e4d6909a2
commit 88b587039c
1 changed files with 6 additions and 5 deletions
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11
drivers/net/can/janz-ican3.c
View File

@ -907,8 +907,8 @@ static void ican3_handle_msglost(struct ican3_dev *mod, struct ican3_msg *msg)
if (skb) {
cf->can_id |= CAN_ERR_CRTL;
cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
stats->rx_over_errors++;
stats->rx_errors++;
stats->rx_bytes += cf->can_dlc;
netif_rx(skb);
}
}
@ -982,7 +982,6 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
dev_dbg(mod->dev, "bus error interrupt\n");
mod->can.can_stats.bus_error++;
stats->rx_errors++;
cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;
switch (ecc & ECC_MASK) {
@ -1001,8 +1000,12 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
break;
}
if ((ecc & ECC_DIR) == 0)
if (!(ecc & ECC_DIR)) {
cf->data[2] |= CAN_ERR_PROT_TX;
stats->tx_errors++;
} else {
stats->rx_errors++;
}
cf->data[6] = txerr;
cf->data[7] = rxerr;
@ -1028,8 +1031,6 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
}
mod->can.state = state;
stats->rx_errors++;
stats->rx_bytes += cf->can_dlc;
netif_rx(skb);
return 0;
}