[PATCH v3 3/4] can: kvaser_usb: Don't send a RESET_CHIP for non-existing channels
From: Ahmed S. Darwish
Date: Mon Jan 05 2015 - 12:57:26 EST
From: Ahmed S. Darwish <ahmed.darwish@xxxxxxxxx>
Recent Leaf firmware versions (>= 3.1.557) do not allow to send
commands for non-existing channels. If a command is sent for a
non-existing channel, the firmware crashes.
Reported-by: Christopher Storah <Christopher.Storah@xxxxxxxxxxxxxxx>
Signed-off-by: Ahmed S. Darwish <ahmed.darwish@xxxxxxxxx>
Signed-off-by: Olivier Sobrie <olivier@xxxxxxxxx>
---
drivers/net/can/usb/kvaser_usb.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
** V3 Changelog:
- Update commit log message per Olivier remarks on v2
diff --git a/drivers/net/can/usb/kvaser_usb.c b/drivers/net/can/usb/kvaser_usb.c
index 9accc82..cc7bfc0 100644
--- a/drivers/net/can/usb/kvaser_usb.c
+++ b/drivers/net/can/usb/kvaser_usb.c
@@ -1503,6 +1503,10 @@ static int kvaser_usb_init_one(struct usb_interface *intf,
struct kvaser_usb_net_priv *priv;
int i, err;
+ err = kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, channel);
+ if (err)
+ return err;
+
netdev = alloc_candev(sizeof(*priv), MAX_TX_URBS);
if (!netdev) {
dev_err(&intf->dev, "Cannot alloc candev\n");
@@ -1607,9 +1611,6 @@ static int kvaser_usb_probe(struct usb_interface *intf,
usb_set_intfdata(intf, dev);
- for (i = 0; i < MAX_NET_DEVICES; i++)
- kvaser_usb_send_simple_msg(dev, CMD_RESET_CHIP, i);
-
err = kvaser_usb_get_software_info(dev);
if (err) {
dev_err(&intf->dev,
--
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