Path: utzoo!attcan!uunet!snorkelwacker!ira.uka.de!smurf!urlichs
From: urlichs@smurf.sub.org (Matthias Urlichs)
Newsgroups: comp.unix.aux
Subject: Re: SCSI device driver PROBLEM
Message-ID: <amx!f2.kl8@smurf.sub.org>
Date: 16 Oct 90 15:32:11 GMT
References: <10716@goofy.Apple.COM>
Organization: University of Karlsruhe, FRG
Lines: 25

In comp.unix.aux, article <10716@goofy.Apple.COM>,
  rick@apple.com (Rick Auricchio) writes:

< > [ problems with my SCSI driver ]
<     If you've written this exactly like your posting, I see the problem.
< 
< >   r->faddr = ds_wakeup();
< 
<     Specifying ds_wakeup() with the parens causes an immediate call to
<     the function.  You want ds_wakeup without parens to just stuff its
<     address.  I got bit by this one a long time ago and it took forever
<     to figure it out.

I hate C. ;-)

But that's not the problem -- I copied the other code over and added that
line to show what's going on.

The problem only shows up when I transfer more than 511 bytes. Tracing shows
that this is when the DMA stuff kicks in, which may or may not have anything
to do with the problem.

-- 
Matthias Urlichs -- urlichs@smurf.sub.org -- urlichs@smurf.ira.uka.de     /(o\
Humboldtstrasse 7 - 7500 Karlsruhe 1 - FRG -- +49+721+621127(0700-2330)   \o)/