From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Mon, 21 Jun 2010 19:09:32 +0200
From: Wolfgang Grandegger <wg@domain.hid>
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Subject: Re: [Xenomai-help] rt_dev_send() does not timeout
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To: "Charlton, John" <john.charlton@domain.hid>
Cc: "'xenomai@xenomai.org'" <xenomai@xenomai.org>

On 06/21/2010 04:52 PM, Charlton, John wrote:
> We are experiencing a problem with the user mode CanFestival library when it calls rt_dev_send() when the CAN bus is disconnected.  In that case the rtcan driver info is:
> 
> root@domain.hid:~# cat /proc/rtcan/rtcan0/info
> Device     rtcan0
> Controller SJA1000
> Board      PEAK-PCI
> Clock-Hz   8000000
> Baudrate   1000000
> Bit-time   brp=1 prop_seg=0 phase_seg1=5 phase_seg2=2 sjw=1 sam=0
> Ctrl-Mode
> State      passive
> TX-Counter 1
> RX-Counter 0
> Errors     2
> Refcount   3
> root@domain.hid:~#
> 
> The rt_dev_send() function hangs and does not timeout or return an error and never returns. We are using Xenomai 2.5.2 with linux 2.6.32.7.

It's the normal behaviour if you have not set RTCAN_RTIOC_SND_TIMEOUT
and don't use non-blocking mode. Is that the case?

Wolfgang.