2.5.65 7880 SCSI bug

2.5.65 7880 SCSI bug

[Greg Copeland]

I have an Asus P2L97-DS motherboard.  It has two PII-333 in it.  I'm
using the onboard SCSI interface, which is a 7880 (U).  I have 5-SCSI
drives (combination of wide and narrow), a SCSI CDROM and a SCSI tape
drive.  The drives have ID's 0-6 while the interface has ID 7.

When attempting to boot 2.5.65 or 2.5.64, neither is able to get past
SCSI initialization.  It simply loops and never completes a boot cycle. 
I have tried both the "newer" Adaptec AIC7xxx Fast -> U160 support (New
Driver) and the older Adaptec AIC7xxx support (old driver).  Both
experience the same behavior.

I'm currently running 2.4.19 and this system has been working, more or
less as is, since the mid 2.2-days.


Best Regards,

Greg Copeland

Re: 2.5.65 7880 SCSI bug

[Zwane Mwaikambo]

On Fri, 28 Mar 2003, Greg Copeland wrote:

> I have an Asus P2L97-DS motherboard.  It has two PII-333 in it.  I'm
> using the onboard SCSI interface, which is a 7880 (U).  I have 5-SCSI
> drives (combination of wide and narrow), a SCSI CDROM and a SCSI tape
> drive.  The drives have ID's 0-6 while the interface has ID 7.
> 
> When attempting to boot 2.5.65 or 2.5.64, neither is able to get past
> SCSI initialization.  It simply loops and never completes a boot cycle. 
> I have tried both the "newer" Adaptec AIC7xxx Fast -> U160 support (New
> Driver) and the older Adaptec AIC7xxx support (old driver).  Both
> experience the same behavior.
> 
> I'm currently running 2.4.19 and this system has been working, more or
> less as is, since the mid 2.2-days.

Could you try booting with the following combinations of kernel 
parameters and report back.

1) "noapic"
2) "maxcpus=1"
3) "noirqbalance" with the appended patch.

Note that this didn't do anything for me either, my current workaround 
until i find out what's wrong is booting with noapic.

Index: linux-2.5.66/arch/i386/kernel/io_apic.c
===================================================================
RCS file: /build/cvsroot/linux-2.5.66/arch/i386/kernel/io_apic.c,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 io_apic.c
--- linux-2.5.66/arch/i386/kernel/io_apic.c	24 Mar 2003 23:40:27 -0000	1.1.1.1
+++ linux-2.5.66/arch/i386/kernel/io_apic.c	28 Mar 2003 16:48:41 -0000
@@ -1143,7 +1143,7 @@ void __init setup_IO_APIC_irqs(void)
 		entry.delivery_mode = INT_DELIVERY_MODE;
 		entry.dest_mode = INT_DEST_MODE;
 		entry.mask = 0;				/* enable IRQ */
-		entry.dest.logical.logical_dest = TARGET_CPUS;
+		entry.dest.logical.logical_dest = 1; /* TARGET_CPUS; */
 
 		idx = find_irq_entry(apic,pin,mp_INT);
 		if (idx == -1) {
-- 
function.linuxpower.ca