netdev - [PATCH v2 3/4] can: kvaser_usb: Don't send a RESET

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Message-ID: <20141225000256.GB24302@vivalin-002>
Date:	Thu, 25 Dec 2014 02:02:56 +0200
From:	"Ahmed S. Darwish" <darwish.07@...il.com>
To:	Olivier Sobrie <olivier@...rie.be>,
	Oliver Hartkopp <socketcan@...tkopp.net>,
	Wolfgang Grandegger <wg@...ndegger.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	Linux-CAN <linux-can@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 3/4] can: kvaser_usb: Don't send a RESET_CHIP for
 non-existing channels

From: Ahmed S. Darwish <ahmed.darwish@...eo.com>

"Someone reported me that recent leaf firmwares go in trouble when
you send a command for a channel that does not exist. Instead ...
you can move the reset command to kvaser_usb_init_one() function."

Suggested-by: Olivier Sobrie <olivier@...rie.be>
Signed-off-by: Ahmed S. Darwish <ahmed.darwish@...eo.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 598e251..2791501 100644
--- a/drivers/net/can/usb/kvaser_usb.c
+++ b/drivers/net/can/usb/kvaser_usb.c
@@ -1505,6 +1505,10 @@ 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");
@@ -1609,9 +1613,6 @@ 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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