[1596] in linux-net channel archive
Device Driver Lockups - Debugging Help Needed!
daemon@ATHENA.MIT.EDU (MrDJ@aol.com)
Sat Jan 6 09:06:55 1996
Date: Fri, 5 Jan 1996 20:45:58 -0500
From: MrDJ@aol.com
To: linux-kernel@vger.rutgers.edu, linux-net@vger.rutgers.edu,
linux-config@vger.rutgers.edu
I am writing a driver (actually, migrating a driver from a TSR from a DOS
app).
It's essentially a serial driver, but for a Synchronous card by Arnet. All it
is intended to do is trap IRQ's from the card, and get the data out of the
card's buffer, and store it in a memory buffer that can later be read from by
the driver_read() function. The driver is a loadable module - I have an
init_module() and cleanup_module() function instead of driver_init()...
For some reason, the driver only loads properly periodically. Sometimes it
loads but doesn't actually print any of the stuff that I print in my
printk()'s on init. Other times, it prints my messages, and then freezes up
the machine. And yet other times, it freezes without printing..
I don't even know where to start on debugging this.. What should I look for?
I tried using kgdb, but it gets Oops messages on startup and can't find any
of my code when I use a command line of "insmod arnet.o" (arnet.o is the name
of the driver file.)
Any tips would be appreciated.
Thanks in advance!
DJ
