[RFC,v2,08/13] can: slcan: send the open command to the adapter
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Message ID 20220602160434.225417-9-dario.binacchi@amarulasolutions.com
State New
Headers show
Series
  • can: slcan: extend supported features
Related show

Commit Message

Dario Binacchi June 2, 2022, 4:04 p.m. UTC 
In case the bitrate has been set via ip tool, it sends the open command
("O\r") to the adapter.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>

---

Changes in v2:
- Fix the spin_unlock() path in the slcan_exit().

 drivers/net/can/slcan.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

Patch
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diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c
index f1bf32b70c4d..f18097c62222 100644
--- a/drivers/net/can/slcan.c
+++ b/drivers/net/can/slcan.c
@@ -469,8 +469,15 @@  static int slc_open(struct net_device *dev)
 	 * can.bittiming.bitrate is 0, causing open_candev() to fail.
 	 * So let's set to a fake value.
 	 */
-	if (sl->can.bittiming.bitrate == 0)
+	if (sl->can.bittiming.bitrate == 0) {
 		sl->can.bittiming.bitrate = -1UL;
+	} else {
+		err = slcan_transmit_cmd(sl, "O\r");
+		if (err) {
+			netdev_err(dev, "failed to send open command 'O\\r'\n");
+			return err;
+		}
+	}
 
 	err = open_candev(dev);
 	if (err) {