Re: kern/112654: [pcn] Kernel panic upon if_pcn module load on a Netfinity 5000

The following reply was made to PR kern/112654; it has been noted by GNATS.

From: wforms@xxxxxxxxxxxxx
To: bug-followup@xxxxxxxxxxx
Cc: marius@xxxxxxxxxxxxxxxxxx, chuzzwassa@xxxxxxxxx
Subject: Re: kern/112654: [pcn] Kernel panic upon if_pcn module load on a Netfinity 5000
Date: Wed, 23 Jan 2008 16:47:23 +0100

BINGO!
Adding this latest nsphyter.c edition of Marius to his former patchset resulted =
in a reliably working pcn driver. So whatever you tried there Marius, is the =
key to the kernel panic problem I reported this PR for. The kernel I built =
with your latest update now loads the if_pcn module without the kernel panic, =
regardless of the RJ45 cable being connected or disconnected, and the pcn0 =
adapter reliably recognizes the presence of the cable. The adapter worked fine =
for basic network testings.

I do not know how ready you consider the current code to be the final fix for =
my PR, or if you need to incorporate the things we just learnt here into a =
larger and more uniformly written patch before it can migrate to the src system. =
I also do not know if a proper fix for FreeBSD 6 needs to be much different =
than for FreeBSD 7, I only recognized that your RELENG_6 patchset introduced =
this new nsphyter thing which did not exist in 6.x before. So I am uncertain =
how much of this are you or the FreeBSD Team willing_to/can inject into RELENG_6 =
about now. However, judging from your latest followup I assume that there may =
not be necessarry to add nsphyter to RELENG_6 just now, because a simplified =
fix implementing this latest reset function change of yours in the good old =
ukphy section of the current 6.3-STABLE code might be perfectly good enough =
for the time being.
But this is not for me to decide, I simply mentioned this as a possible option.

Anyway, GOOD JOB guys!
Thank you!

P.S.: That backtrace thing I should have given you in case your patch does =
not work, is unknown for me. I assume it may be usefull to know this in the =
future and I am happy to improve my knowledge, so if you can point me to a =
page where I can learn what that is, I would appreciate it.
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