In case the bitrate has been set via ip tool, this patch changes the
driver to send the close command ("C\r") to the adapter.
Signed-off-by: Dario Binacchi <dario.binacchi@xxxxxxxxxxxxxxxxxxxx>
---
(no changes since v2)
Changes in v2:
- Improve the commit message.
drivers/net/can/slcan.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c
index 9bbf8f363f58..82a42cec52d3 100644
--- a/drivers/net/can/slcan.c
+++ b/drivers/net/can/slcan.c
@@ -436,9 +436,20 @@ static int slcan_transmit_cmd(struct slcan *sl, const unsigned char *cmd)
static int slc_close(struct net_device *dev)
{
struct slcan *sl = netdev_priv(dev);
+ int err;
spin_lock_bh(&sl->lock);
if (sl->tty) {
+ if (sl->can.bittiming.bitrate &&
+ sl->can.bittiming.bitrate != -1) {
+ spin_unlock_bh(&sl->lock);
+ err = slcan_transmit_cmd(sl, "C\r");
+ spin_lock_bh(&sl->lock);
+ if (err)
+ netdev_warn(dev,
+ "failed to send close command 'C\\r'\n");
+ }
+
/* TTY discipline is running. */
clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
}
--
2.32.0
