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SubjectRe: aic7xxx broken in 2.5.53/54 ?
> [gibbs@scsiguy.com]
>
> These reads are actually more expensive than just using PIO. Neither of
> these older drivers included a test to try and catch fishy behavior.

Justin, are you quite sure that these tests actually work?
I too have just run into

aic7xxx: PCI Device 0:16:0 failed memory mapped test. Using PIO.
aic7xxx: PCI Device 0:17:0 failed memory mapped test. Using PIO.

with aic79xx-linux-2.4-20021230 (6.2.25) in Linux 2.4.21-pre3.
What makes me scratch my head in particular is:

o The chipset is i440BX aka the Compatibility King.
o I've never had *any* problems with 6.2.8.

Full ahc boot-up messages follow:

PCI: Found IRQ 11 for device 00:10.0
aic7xxx: PCI Device 0:16:0 failed memory mapped test. Using PIO.
PCI: Found IRQ 10 for device 00:11.0
aic7xxx: PCI Device 0:17:0 failed memory mapped test. Using PIO.
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.25
<Adaptec 2940 Ultra SCSI adapter>
aic7880: Ultra Single Channel A, SCSI Id=7, 16/253 SCBs

scsi1 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.25
<Adaptec 2940 Ultra SCSI adapter>
aic7880: Ultra Single Channel A, SCSI Id=7, 16/253 SCBs

(scsi1:A:4): 20.000MB/s transfers (20.000MHz, offset 15)
(scsi0:A:3): 20.000MB/s transfers (20.000MHz, offset 15)
Vendor: SEAGATE Model: ST39173N Rev: 6244
Type: Direct-Access ANSI SCSI revision: 02
scsi0:A:3:0: Tagged Queuing enabled. Depth 253
Vendor: SEAGATE Model: ST39173N Rev: 6244
Type: Direct-Access ANSI SCSI revision: 02
scsi1:A:4:0: Tagged Queuing enabled. Depth 253
Attached scsi disk sda at scsi0, channel 0, id 3, lun 0
Attached scsi disk sdb at scsi1, channel 0, id 4, lun 0
...

--
Tomas Szepe <szepe@pinerecords.com>
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