pata_via(?): cdrom is recognized as hard drive

pata_via(?): cdrom is recognized as hard drive

[Michael Tokarev]

And one more issue with my attempt to switch
from via82cxxx to pata_via.

I noticied that on all machines I tried to convert,
CD-Rom devices are recognized as hard disks.

With via82cxxx and ide-cd, it was like
hdc: IDE cdrom model=FX4830T s/n=4JV6F7Q4 fw=8.01 udma5

But with pata_via and 2.6.23, it's handled by sd_mod:

# ls /sys/block
sda/  sdb/  sdc/  sdd/
# cat /sys/block/sdc/removable
0
# cat /sys/block/sdc/device/type
0
# echo "'$(cat /sys/block/sdc/device/model)'"
 '                '
# echo "'$(cat /sys/block/sdc/device/vendor)'"
'        '

# hdparm -i /dev/sdc

/dev/sdc:

 Model=FX4830T                                 , FwRev=R02E    , SerialNo=
 Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=128kB, MaxMultSect=0
 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4
 DMA modes:  sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 *udma2
 AdvancedPM=no

 * signifies the current active mode


Is it how the things supposed to be, or is something wrong with
the detection?  Note that this happens on several machines,
however all of them so far has via82cxxx controller:

0000:00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
(VT8633 chipset)

(I use pata_via driver on a home machine for a long time, with another
controller (CN700/VN800/P4M800CE/Pro chipset)), and everything there
works as expected, since early pata days).

2.6.20, 2.6.22, 2.6.23 behaves the same.

Thanks.

/mjt

Re: pata_via(?): cdrom is recognized as hard drive

[Alan Cox]

On Wed, 17 Oct 2007 19:35:52 +0400
Michael Tokarev <mjt@tls.msk.ru> wrote:

> And one more issue with my attempt to switch
> from via82cxxx to pata_via.
> 
> I noticied that on all machines I tried to convert,
> CD-Rom devices are recognized as hard disks.

Thats deeply weird.

> But with pata_via and 2.6.23, it's handled by sd_mod:

CD's are handled by sr_mod. I suspect this is actually arising out of the
fact both devices seem to be falling over each other after the SRST.

Can you stick all this in a bugzilla and assign it to me so it doesn't
get lost.

Alan