IDE and CDROM devices (was Re: [IDE bug] hdparm lockup)

IDE and CDROM devices (was Re: [IDE bug] hdparm lockup)

[Petr Vandrovec]

On 25 Jul 02 at 9:38, Marcin Dalecki wrote:
> Andrew Morton wrote:
> > 
> > /dev/hdc:
> >  HDIO_GETGEO_BIG failed: Invalid argument
> >  (what's this?)
> 
> Please don't call every bug out there IDE. Thanks.
> Becouse this one is acutally most likely due to the ioctl() handling
> changes between 27 and 28...

Any plans to fix 'hdparm -I /dev/atapi-cdrom-device' I reported to
you and Bartolomiej at the end of June? ide_*_taskfile
sets REQ_SPECIAL, but ide-cd calls cdrom_end_request(drive, rq, 1) 
on all such requests without looking at them or without trying to
execute them. This forces hdparm -I to think that ATA identify
suceeded and returned all zeroes:

/dev/hdd:

removable ATA device, with non-removable media
Standards:
        Likely used: 1
Configuration:
        Logical               max current
        cylinders             0   0
        heads                 0   0
        ...
Capabilities:
        no IORDY
        Cannot perform double-word IO
        r/w/ multiple sector transfer: not supported
        DMA: not supported
        PIO: pio0        

while 'hdparm -i' correctly reports that it is Toshiba DVD device
supporting IORDY, pio0-4, sdma0-2, mdma0-2, udma0-2, according
to ATA2-ATA5.
                                                Thanks,
                                                    Petr Vandrovec
                                                    vandrove@vc.cvut.cz