diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2014-07-25 22:16:40 +0400 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2014-08-21 12:50:00 +0400 |
| commit | 8ce261d0bb491da957278cdcba207791f329d1da (patch) | |
| tree | 6e03a19648f7b073d73d7dae621136631414923c /drivers/net/can/flexcan.c | |
| parent | bc03a54139baafcd8fe89ad115411c2c9c8a4905 (diff) | |
| download | linux-8ce261d0bb491da957278cdcba207791f329d1da.tar.xz | |
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>
Diffstat (limited to 'drivers/net/can/flexcan.c')
| -rw-r--r-- | drivers/net/can/flexcan.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index a691651f9ad9..944aa5d3af6e 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -549,6 +549,13 @@ static void do_state(struct net_device *dev, /* process state changes depending on the new state */ switch (new_state) { + case CAN_STATE_ERROR_WARNING: + netdev_dbg(dev, "Error Warning\n"); + cf->can_id |= CAN_ERR_CRTL; + cf->data[1] = (bec.txerr > bec.rxerr) ? + CAN_ERR_CRTL_TX_WARNING : + CAN_ERR_CRTL_RX_WARNING; + break; case CAN_STATE_ERROR_ACTIVE: netdev_dbg(dev, "Error Active\n"); cf->can_id |= CAN_ERR_PROT; |