AHA2842 controller doesn't work anymore?

[Mike Isely]

Well I've heard precisely zero feedback about this.  So I guess nobody's
using the AHA2842 controller anymore.  Is there *anyone* successfully
using this controller with a recent (5.1.26 or later) aic7xxx driver
version? 

For what it's worth, I narrowed down the point where the breakage was
introduced.  The last working version of the aic7xxx driver (for aic7770)
is 5.1.25.  Starting with 5.1.26 the Linux kernel panics on boot with this
driver controlling an AHA2842 controller card. 

I did this testing using stock 2.2.14 kernel sources, patching up the
driver to the next version after every test.  I used the same kernel
configuration each time and compiled each kernel from a clean source tree. 

Suggestions anyone?

  -Mike


On Mon, 3 Apr 2000, Mike Isely wrote:

> 
> 
> Am I the only one left who's actually still using an Adaptec 2842?  It
> appears that 2842 support in the current version of the aic7xxx driver
> may be broken.  Allow me to explain:
> 
> I have one old 486/66MHz 32MB system with an Adaptec AHA2842
> controller in it.  It uses a Micropolis 1.7GB 2217 SCSI2-Fast
> harddrive, and also has an old Toshiba 3401 2X CDROM.  This system was
> assembled out of old spare parts over a year ago.  It runs only Linux
> and has been stable the entire time.  Its hardware configuration
> hasn't changed for almost a year.  (Why have it?  Because it makes a
> great X station.)
> 
> I tend to run very late but stable-series kernels on it.  It's been
> running kernel 2.2.15pre10 (with the IDE patch applied - this kernel
> is used on several different machines).  This kernel has version
> 5.1.23 of the aic7xxx driver.  This works fine.
> 
> Tonight I tried out 2.2.15pre17.  Same exact kernel configuration
> (same .config file).  This has version 5.1.28 of the aic7xxx driver.
> It failed to boot, panicing inside of the aic7xxx driver.  Here's the
> relevant text (hand-transposed from the panic screen, hopefully no
> typos):
> 
> |
> | Detected scsi disk sda at scsi0, channel 0, id 0, lun0
> | (scsi0) BRKADRINT error(0x2):
> |   Illegal Sequencer Address referenced
> | (scsi0)   SEQADDR=0x1
> | Kernel panic: aic7xxx: unrecoverable BRKADRINT.
> |
> 
> It appears that something broke AHA2842 support between version 5.1.23
> and version 5.1.28.  I'm trying to narrow that down now.  The first
> thing I tried was to patch the 2.2.15pre10 kernel forward, starting
> with the 5.1.24 aic7xxx patch.  However the patch failed to apply
> correctly, with rejects inside of aic7xxx.c.  No idea why except that
> perhaps the "version" of 5.1.23 inside of aic7xxx.c is different than
> what the 5.1.24 patch was generated from.  So for now I'm compiling
> different 2.2.15preXX "stock" kernels (i.e. no extra patches like the
> IDE patch) in order to see where the breakage occurs.  What I've got
> so far is that that 2.2.15pre13 is ok and the driver panics in
> 2.2.15pre15.  Unfortunately that doesn't say much because 2.2.15pre13
> uses 5.1.23 and 2.2.15pre15 uses 5.1.28.  Argh!
> 
> I'll try 2.2.15pre14 and see if that works.  Then I'll take the last
> working kernel version and try to patch the aic7xxx driver forward in
> order to see where the breakage happens.
> 
> Is this ringing any bells with anyone?  Is there anything more
> specific I can provide (like my .config) that can help uncover what is
> going on?  As I said, I **really** don't see this as being a hardware
> problem, given that the hardware in question hasn't changed for a long
> time and has been running Linux with older versions of the driver.
> I've had this controller for years, and have used the aic7xxx driver
> (or an ancestor of it) since back when the current Linux kernel was
> 1.1.49.
> 
> Is this just a case of the AHA2842 not being verified for a while?  I
> can be a test bed for this if needed.  The machine in question is not
> critical for me at the moment.
> 
>   -Mike
> 
> 
>                         |         Mike Isely          |     PGP fingerprint
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                        |         Mike Isely          |     PGP fingerprint
    POSITIVELY NO       |                             | 03 54 43 4D 75 E5 CC 92
 UNSOLICITED JUNK MAIL! |   isely @ pobox (dot) com   | 71 16 01 E2 B5 F5 C1 E8
                        |   (spam-foiling  address)   |



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