can: kvaser_usb: add retries/timeout to kvaser_usb_wait_msg()

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On some Kvaser hardware, the firmware returns extra messages after the
request for card info. For instance on a Leaf Light v2:
  --> CMD_GET_CARD_INFO
  <-- CMD_USB_THROTTLE
  <-- CMD_GET_CARD_INFO2
  <-- CMD_GET_CARD_INFO_REQ
When it happens, the probing function fails because we only read
the first usb message.

To overcome this issue, we add a mechanism of retries to the
kvaser_usb_wait_msg() function.

I tested this patch with the following hardware:
 - Kvaser Leaf Light
 - Kvaser Leaf Light v2
 - Kvaser USBCan R

This patch is necessary for the Leaf Light v2 hardware.

Signed-off-by: Olivier Sobrie <olivier@sobrie.be>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

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Olivier Sobrie 2014-04-10 21:44:21 +02:00 • committed by Marc Kleine-Budde

parent 869ba1e67a

commit e59e36e733

1 changed files with 27 additions and 22 deletions

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drivers/net/can/usb/kvaser_usb.c

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