On 12/08/2011 05:19 PM, Anders Blomdell wrote:
On 12/07/2011 08:58 AM, Anders Blomdell wrote:
On 12/06/2011 11:47 PM, Alexis Berlemont wrote:
Hi

On Thu, Dec 1, 2011 at 4:03 PM, Anders Blomdell
<anders.blomd...@control.lth.se> wrote:
On 11/30/2011 07:03 PM, Anders Blomdell wrote:

Hi, just found that

echo 0000:06:01.0> /sys/bus/pci/drivers/analogy_mite/unbind

does not do the same thing as

analogy_config -r analogyN

in fact it leaves the system in a state where using the driver results
in a kernel OOPS.

Will try to look into it further tomorrow...

OK seems like we have some interrupt cleanup problem, the following
command
sequence:


OK thank you for the report. I did not have time to look at it yet but
that will be done soon.

Is it blocking for you?
Yes, and even worse is this problem:

# /usr/local/sbin/analogy_config analogy0 analogy_ni_pcimio 6,1
# /usr/local/sbin/analogy_config -r analogy0
# cat /proc/xenomai/irq
Killed

I was looking into it last week, but is a workshop since monday, will
get back at this tomorrow.
Seems like somebody is stomping out
dev->transfer.irq_desc.rtdm_desc.flags between attach and detach (flags
and all fields in its vicinity is zeroed out), hence the interrupt is
never removed from the interrupt handler tables wreaking havoc with the
entire kernel.

Found the guilty party: a4l_cleanup_transfer, which zeroes out all the interrupt data, just before the interrupt should be detached. Somebody is being overzealous about keeping memory shiningly clean. We need to keep the useful dirt.

--- xenomai-2.6.0/ksrc/drivers/analogy/transfer.c.orig 2011-12-09 11:22:06.961999598 +0100 +++ xenomai-2.6.0/ksrc/drivers/analogy/transfer.c 2011-12-09 11:22:29.723999243 +0100
@@ -92,8 +92,6 @@
                rtdm_free(tsf->subds);
        }

-       memset(tsf, 0, sizeof(a4l_trf_t));
-
        return 0;
 }


/Anders


--
Anders Blomdell                  Email: anders.blomd...@control.lth.se
Department of Automatic Control
Lund University                  Phone:    +46 46 222 4625
P.O. Box 118                     Fax:      +46 46 138118
SE-221 00 Lund, Sweden


_______________________________________________
Xenomai-core mailing list
Xenomai-core@gna.org
https://mail.gna.org/listinfo/xenomai-core

Reply via email to