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can: flexcan: handle state passive -> warning transition
Once the CAN-bus is open and a packet is sent, the controller switches into the PASSIVE state. Once the BUS is closed again it goes the back err-warning. The TX error counter goes 0 -> 0x80 -> 0x7f. This patch makes sure that the user learns about this state chang (CAN_STATE_ERROR_WARNING => CAN_STATE_ERROR_PASSIVE) Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Matthias Klein <matthias.klein@optimeas.de> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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@ -549,6 +549,13 @@ static void do_state(struct net_device *dev,
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/* process state changes depending on the new state */
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switch (new_state) {
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case CAN_STATE_ERROR_WARNING:
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netdev_dbg(dev, "Error Warning\n");
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cf->can_id |= CAN_ERR_CRTL;
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cf->data[1] = (bec.txerr > bec.rxerr) ?
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CAN_ERR_CRTL_TX_WARNING :
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CAN_ERR_CRTL_RX_WARNING;
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break;
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case CAN_STATE_ERROR_ACTIVE:
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netdev_dbg(dev, "Error Active\n");
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cf->can_id |= CAN_ERR_PROT;
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