Simply resetting the peripheral on bus off condition is not enough,
Because we also need to re-initialize the whole device.
This patch fixes this issue.
Signed-off-by: Kedareswara rao Appana <appa...@xilinx.com>
---
drivers/net/can/xilinx_can.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
index 055d6f3..9aeb85f 100644
--- a/drivers/net/can/xilinx_can.c
+++ b/drivers/net/can/xilinx_can.c
@@ -529,6 +529,8 @@ static int xcan_rx(struct net_device *ndev)
return 1;
}
+static void xcan_chip_stop(struct net_device *ndev);
+
/**
* xcan_err_interrupt - error frame Isr
* @ndev: net_device pointer
@@ -558,8 +560,9 @@ static void xcan_err_interrupt(struct net_device *ndev, u32
isr)
if (isr & XCAN_IXR_BSOFF_MASK) {
priv->can.state = CAN_STATE_BUS_OFF;
priv->can.can_stats.bus_off++;
- /* Leave device in Config Mode in bus-off state */
- priv->write_reg(priv, XCAN_SRR_OFFSET, XCAN_SRR_RESET_MASK);
+ /* Re-initialize the whole device in bus-off state */
+ xcan_chip_stop(ndev);
+ xcan_chip_start(ndev);
can_bus_off(ndev);
if (skb)
cf->can_id |= CAN_ERR_BUSOFF;
--
2.1.2
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