Re: 2.4.20pre7, aic7xxx-6.2.8: Panic: HOST_MSG_LOOP with invalid SCB 0

From: Marcelo Tosatti (
Date: Mon Sep 23 2002 - 11:54:05 EST

On Mon, 23 Sep 2002, Justin T. Gibbs wrote:

> > Justin,
> >
> > I guess is the second or third report of problems with the new aic7xxx :(
> This issue has already been resolved as a chipset issue requiring
> I/O mapped register access to work around. The "old" aic7xxx driver
> avoids these issues by issuing a register read after every register
> write. This stops up your PCI bus with wasted cycles even if you have
> a perfectly working chipset.
> So, how would you like me to resolve this. We can do the same thing
> as Adaptec's windows drivers and just always use the slower, less
> efficient I/O mapped method for accessing registers. This will "fix"
> the problems people have with broken VIA and Intel chipsets. I can
> make this a compile and run-time option, but should we default to
> I/O mapped or memory mapped?
> Don't you just love broken PC hardware?

Its all fine, then: I thought the problems were caused by some bug in the
driver itself.

Thanks for explaining me the issue clearly. :)

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

This archive was generated by hypermail 2b29 : Mon Sep 23 2002 - 22:00:39 EST