Kernel 2.6.9 undecoded slave problem, fixed in 2.6.10-rc2-bk8!

[Justin Piszcz]

I have fixed this issue but I just wanted to let others that have this 
issue know that 2.6.10-rc2-bk8 has fixed the issue.

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Problem: Only one of my CDROM's is recognized when both drives are 
attached to the 1 IDE bus of a PROMISE 20269 controller.  When I have them 
attached to the motherboard (Intel 440BX), I do not have this problem.

> From dmesg:

hde: SAMSUNG SC-140B, ATAPI CD/DVD-ROM drive
hdf: SAMSUNG SC-140B, ATAPI CD/DVD-ROM drive
ide-probe: ignoring undecoded slave

In: http://www.uwsg.iu.edu/hypermail/linux/kernel/0410.3/1288.html

There is a message that states:

<bzolnier@trik.(none)> (04/10/26 1.2191)
[ide] ide-probe: undecoded slave fixup

Undecoded slave fixup is a oneliner patch to ide-probe to
recognize both of my Maxtor drives that appear to have the same
serial number, D3000000.

Another thread:
http://www.ussg.iu.edu/hypermail/linux/kernel/0409.2/1665.html

The interesting part of all of this is that this only occurs when I have 
the two cdroms on a promise controller, on the same IDE channel, normally 
I have them both on the motherboard as master and slave.  I wanted to make 
sure the card worked however, so switched the connection over to the 
promise board and then I am getting the same error as the guy above, 
except in my case it is with two identical CDROMS and not hard drives.

The problem occurs with 2.6.9.

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Update: With 2.6.10-rc2-bk8, it has fixed the problem!

hde: SAMSUNG SC-140B, ATAPI CD/DVD-ROM drive
hdf: SAMSUNG SC-140B, ATAPI CD/DVD-ROM drive
ide2 at 0xd8f8-0xd8ff,0xd8f2 on irq 11
hde: ATAPI 40X CD-ROM drive, 128kB Cache
Uniform CD-ROM driver Revision: 3.20
hdf: ATAPI 40X CD-ROM drive, 128kB Cache
Probing IDE interface ide3...

root@p500b:~# mount /dev/hde /mnt/cd1
mount: block device /dev/hde is write-protected, mounting read-only
root@p500b:~# mount /dev/hdf /mnt/cd2
mount: block device /dev/hdf is write-protected, mounting read-only
root@p500b:~#

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