[3.13.y-ckt stable] Patch "can: kvaser_usb: Don't send a RESET_CHIP for non-existing channels" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    can: kvaser_usb: Don't send a RESET_CHIP for non-existing channels

to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue

This patch is scheduled to be released in version 3.13.11-ckt16.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From 1d35b5476c60a292208aae8b85d04f186c8726f1 Mon Sep 17 00:00:00 2001
From: "Ahmed S. Darwish" <ahmed.darwish at valeo.com>
Date: Mon, 5 Jan 2015 12:57:13 -0500
Subject: can: kvaser_usb: Don't send a RESET_CHIP for non-existing channels

commit 5e7e6e0c9b47a45576c38b4a72d67927a5e049f7 upstream.

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 at invetech.com.au>
Signed-off-by: Olivier Sobrie <olivier at sobrie.be>
Signed-off-by: Ahmed S. Darwish <ahmed.darwish at valeo.com>
Signed-off-by: Marc Kleine-Budde <mkl at pengutronix.de>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/net/can/usb/kvaser_usb.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/can/usb/kvaser_usb.c b/drivers/net/can/usb/kvaser_usb.c
index 925273c..63fb90b 100644
--- a/drivers/net/can/usb/kvaser_usb.c
+++ b/drivers/net/can/usb/kvaser_usb.c
@@ -1494,6 +1494,10 @@ 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");
@@ -1597,9 +1601,6 @@ 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,
--
1.9.1