Date: Sun, 12 Aug 2007 09:30:14 GMT From: Juergen Dankoweit <Juergen.Dankoweit@T-Online.de> To: freebsd-scsi@FreeBSD.org Subject: Re: kern/114597: [sym] System hangs at SCSI bus reset with dual HBAs Message-ID: <200708120930.l7C9UEb2071600@freefall.freebsd.org>
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The following reply was made to PR kern/114597; it has been noted by GNATS.
From: Juergen Dankoweit <Juergen.Dankoweit@T-Online.de>
To: bug-followup@FreeBSD.org, Juergen.Dankoweit@FreeBSD-Onkel.de
Cc:
Subject: Re: kern/114597: [sym] System hangs at SCSI bus reset with dual
HBAs
Date: Sun, 12 Aug 2007 11:08:21 +0200
Hello,
after thinking how to solve this awful problem, I found this solution
which works great. Here the code snippet
/* Checking for sym-driver is disabled in the device.hints */
unit = device_get_unit(dev);
if (resource_disabled("sym", unit)) {
device_printf(dev, "sym_pci_probe: sym driver disabled\n");
return (ENXIO);
}
/* ------------------------------------------------------- */
It should be place in the following functions:
----------------------------------------------
line 8465: static int sym_pci_probe(device_t dev);
line 8482: static int sym_pci_attach(device_t dev);
What does it do:
----------------
It looks in the /boot/device.hints after the following entry:
hints.sym.x.disabled="1" (where x = 0, 1, 2, ...)
Why this solution:
------------------
The problem is that FreeBSD finds on some systems the LSI chips even if
they are disabled by the BIOS. To suppress this I added this hint. Now
it is possible to install FreeBSD on systems with LSI where the boot
sequence hangs. So it is possible to use an other host adaptor like
Adaptec or so.
Conclusion:
-----------
It is tested on several machines and it works great.
It would be nice if this is in the next FreeBSD 7.0 snapshot.
Best regards
Juergen Dankoweit
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