Re: aix7xxx driver 5.2.4/5.2.0 vs. 6.2.5 with onboard aic7896/97 Ultra2 controller

Doug Ledford
2002-05-07T14:45:17Z

On Tue, May 07, 2002 at 08:31:18AM -0600, Justin T. Gibbs wrote:
> The old driver works around this issue by treating a valid but slow
> sync rate as the fastest rate.

Not intentionally. If that's why my driver is getting the higher rate
then it's a bug in the driver. It was never intended to ignore slow speed
settings in the serial eeprom.

Ahhh...I know what it is...there were, back in the day when the 7895 was
new, some BIOS versions that used odd combinations for slow speeds vs.
high speeds, so there are a few specific instances of things in the driver
that would cause a particular low speed to get bumped to a higher speed.
At the time, the problem machines were showing up as 10MB/s when they were
suppossed to be 20 or 40MB/s. So, this particular BIOS may have left
around the same type of speed encoding as those older trouble machines.
I'd be interested to know if changing the speed and saving it, then
changing it back and saving it does solve the problem.

--
Doug Ledford <dledford@redhat.com> 919-754-3700 x44233
Red Hat, Inc.
1801 Varsity Dr.
Raleigh, NC 27606