diff options
Diffstat (limited to 'drivers/net/can/flexcan.c')
| -rw-r--r-- | drivers/net/can/flexcan.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index 28b6283aacf2..868fe945e35a 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -878,6 +878,8 @@ static int flexcan_chip_start(struct net_device *dev) /* save for later use */ priv->reg_ctrl_default = reg_ctrl; + /* leave interrupts disabled for now */ + reg_ctrl &= ~FLEXCAN_CTRL_ERR_ALL; netdev_dbg(dev, "%s: writing ctrl=0x%08x", __func__, reg_ctrl); flexcan_write(reg_ctrl, ®s->ctrl); @@ -937,8 +939,11 @@ static int flexcan_chip_start(struct net_device *dev) priv->can.state = CAN_STATE_ERROR_ACTIVE; - /* enable FIFO interrupts */ + /* enable interrupts atomically */ + disable_irq(dev->irq); + flexcan_write(priv->reg_ctrl_default, ®s->ctrl); flexcan_write(FLEXCAN_IFLAG_DEFAULT, ®s->imask1); + enable_irq(dev->irq); /* print chip status */ netdev_dbg(dev, "%s: reading mcr=0x%08x ctrl=0x%08x\n", __func__, |