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SubjectRe: AIC7xxx kernel driver; ATTN Mr. Justin T. Gibbs
Alan Cox wrote:
: Except for an obscure bug under very high memory load I'm not aware of any
: outstanding bugs in the AIC7xxx driver, certainly not like you describe. There
: is however always a first time for any bug 8)

Well, AIC7xxx crashes on me with stock 2.4.5 kernel
(Athlon TB 850, ASUS A7V). I run 2.4.3 + zerocopy patches, and when I tried
to upgrade to 2.4.5, it crashes during boot while initializing the AIC7xxx
driver. I have written down the Oops numbers by hand, but I had to
reboot the server back to 2.4.3+zerocopy.

Here are relevant parts of dmesg on 2.4.3 (just to identify the

SCSI subsystem driver Revision: 1.00
request_module[scsi_hostadapter]: Root fs not mounted
PCI: Found IRQ 12 for device 00:0a.0
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.1.5
<Adaptec 2940 Ultra SCSI adapter>
aic7880: Wide Channel A, SCSI Id=7, 16/255 SCBs

Vendor: SEAGATE Model: ST118273W Rev: 5698
Type: Direct-Access ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
(scsi0:A:0): 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
scsi0:0:0:0: Tagged Queuing enabled. Depth 8
SCSI device sda: 35566480 512-byte hdwr sectors (18210 MB)
sda: sda1 sda2

Now the Oops tracing:

EIP was ahc_match_scb + 0x19

Call trace:

ahc_search_qinfifo + 0x187
ahc_abort_scbs + 0x6a
__udelay + 0x27
ahc_reset_current_channel + 0x27c
ahc_pci_config + 0x4e2
pci_read_config_byte + 0x1c


\ Jan "Yenya" Kasprzak <kas at>
\\ PGP: finger kas at 0D99A7FB206605D7 8B35FCDE05B18A5E //
\\\ Czech Linux Homepage: ///
It is a very bad idea to feed negative numbers to memcpy. --Alan Cox
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