Bug 7029

Most recent kernel where this bug did not occur:
Never used libata on this hw before

Distribution:
Ark Linux 2006.1

Hardware Environment:
Asus Pundit-S barebone, SiS chipset, 80 GB harddisk (primary master), Noname 
DVD-ROM drive (primary slave) (Hardware doesn't provide a secondary IDE 
controller)

Software Environment:
Kernel 2.6.18-rc4-mm1, loading pata_sis from initramfs, so not much else is 
there

Problem Description:
pata_sis fails to detect the CD/DVD drive, "old" IDE drivers work fine (and 
I'm actually booting from the "non-working" CD/DVD drive up to getting the 
error).

Output during bootup:

ata1: PATA max UDMA/133 cmd 0x1F0 ctl 0x3F6 bmdma 0xA400 irq 14
ata2: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xA408 irq 15

(note that this is wrong, the box definitely has only 1 channel)

scsi0 : pata_sis
ata1.00: ATA-6, max UDMA/100, 156299376 sectors: LBA
ata1.00: ata1: dev 0 multi count 16
ata1.01: failed to IDENTIFY (device reports illegal type, err_mask=0x0)

(This should be the DVD-ROM...)

ata1: failed to recover some devices, retrying in 5 secs
ata1.00: configured for UDMA/100
scsi1 : pata_sis
ata2: port disabled. ignoring.
ata2: SRST failed (status 0xFF)
ata2: SRST failed (err_mask=0x100)
ata2: softreset failed, retrying in 5 secs
ata2: SRST failed (status 0xFF)
ata2: SRST failed (err_mask=0x100)
ata2: softreset failed, retrying in 5 secs
ata2: SRST failed (status 0xFF)
ata2: SRST failed (err_mask=0x100)
ata2: softreset failed, retrying in 5 secs
ata2: reset failed, giving up
scsi 0:0:0:0 Direct access     ATA      ST380011A     3.04 PQ: 0 ANSI: 5
SCSI device sda: 156299375 512-byte hdwr sectors (80025 MB)
sda: Write Protect is off
SCSI device sda: drive cache: write back
SCSI device sda: 156299375 512-byte hdwr sectors (80025 MB)
sda: Write Protect is off
SCSI device sda: drive cache: write back
 sda: sda1
 sda: p1 exceeds device capacity

(this could actually be, the disk was not properly formatted yet)

sd 0:0:0:0: Attached scsi disk sda

Steps to reproduce: