enable_irq() unbalanced messages on boot

[Doug Ledford]

Robert Stuart wrote:
> 
> Hi,
> 
> I'm wondering what the enable_irq() message lines below mean.  They are
> generated on booting the machine from a newly built kernel 2.2.14.  I'm
> using RH6.1

The enable_irq unbalanced messages are harmless.  It just means that when the
driver called disable_irq there were no devices already using the irq, and as
such it was already disabled, so the call to disable_irq was forgotten by the
kernel, so when we call enable_irq the core kernel code thinks it's unbalanced
when it isn't.

> This machine BTW has problems booting from the SCSI drives with lilo.
> It starts loading initrd/vmlinuz (I can't remember which) indicated by
> dots, and then stops and eventuall gives an error code indicating 0x80
> ("Disk timeout").

Sounds like disk problems more than anything else.  I would go into the SCSI
BIOS area of the Adaptec controller, into the Disk Utilities, and run the
Verify Media command to make the disk remap any bad sectors.

> The machine is using two Adaptec 2940U2W cards.  I believe I have
> termination right.
> 
> Thanks in advance.
> 
> (scsi0) <Adaptec AHA-294X Ultra2 SCSI host adapter> found at PCI 0/10/0
> (scsi0) Wide Channel, SCSI ID=7, 32/255 SCBs
> (scsi0) Downloading sequencer code... 396 instructions downloaded
> enable_irq() unbalanced from d0828b0e
> (scsi1) <Adaptec AHA-294X Ultra2 SCSI host adapter> found at PCI 0/11/0
> (scsi1) Wide Channel, SCSI ID=7, 32/255 SCBs
> (scsi1) Downloading sequencer code... 396 instructions downloaded
> enable_irq() unbalanced from d0828b0e
> scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.28/3.2.4
>        <Adaptec AHA-294X Ultra2 SCSI host adapter>
> scsi1 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.28/3.2.4
>        <Adaptec AHA-294X Ultra2 SCSI host adapter>
> scsi : 2 hosts.
> (scsi0:0:0:0) Synchronous at 40.0 Mbyte/sec, offset 31.
>   Vendor: QUANTUM   Model: XP39100W          Rev: LXY4
>   Type:   Direct-Access                      ANSI SCSI revision: 02
> Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
> (scsi1:0:0:0) Synchronous at 40.0 Mbyte/sec, offset 31.
>   Vendor: QUANTUM   Model: XP39100W          Rev: LXY4
>   Type:   Direct-Access                      ANSI SCSI revision: 02
> Detected scsi disk sdb at scsi1, channel 0, id 0, lun 0
>   Vendor: IMS       Model: CDD522/10         Rev: 1.06
>   Type:   WORM                               ANSI SCSI revision: 01
> SCSI device sda: hdwr sector= 512 bytes. Sectors= 17781520 [8682 MB]
> [8.7 GB]
>  sda: sda1 sda2 < sda5 > sda3
> SCSI device sdb: hdwr sector= 512 bytes. Sectors= 17781520 [8682 MB]
> [8.7 GB]
>  sdb: sdb1 < sdb5 sdb6 > sdb3
> 
> Robert Stuart
> Qld Board of Senior Secondary School Studies
> ph: 3864 0364
> 
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-- 

 Doug Ledford <dledford at redhat.com>  http://people.redhat.com/dledford
      Please check my web site for aic7xxx updates/answers before
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