Date: Fri, 23 Jan 1998 11:09:25 +1030 From: Mike Smith <mike@smith.net.au> To: Bill Trost <trost@cloud.rain.com> Cc: mobile@FreeBSD.ORG Subject: Re: SVEC NE2000 "clone" doom and gloom Message-ID: <199801230039.LAA00343@word.smith.net.au> In-Reply-To: Your message of "Thu, 22 Jan 1998 10:50:04 -0800." <m0xvRlL-0002WeC@jli.com>
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> I did some beating on pccardd, and saw some problems. As you will recall, > the config info had two memory blocks: > > Memory descriptor 1 > blk length = 0x400 card addr = 0x000 host addr = 0xd4000 > Memory descriptor 2 > blk length = 0x4000 card addr = 0x4000 host addr = 0xd4000 > > pccardd blindly tries to map the first block. Since the block is less than the > memory quanta of MEMUNIT, bit_fns ends up getting asked to allocate a memory > region of size zero (ROUNDOFF BUG!), which it can't do. Damn, I've seen this one before too. Want to submit a patch? 8) > So, I "fix" the bug using gdb, and am rewarded with a hang in the PIOCSDRV > ioctl at the end of setup_slot (can't even get DDB to say hello). Using gdb to > make pccardd use the other memory region, or to not use the memory regions at > all, produces a similar hang. Ouch. That's almost certainly in allocate_driver(). Dumb question, but do you have the 'ed' driver in your kernel? If you throw a few printf()'s in sys/pccard.c:allocate_driver() you should be able to work out what's going wrong pretty quickly. > AARGH! Yeah, sure, NE2000-compatible my foot! Could be. Nobody said the code was perfect either. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\
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