cdrom drive doens't answering

Hi,
today I was installing mutt from my own slack 9.1 cdrom. As soon as I wrote installpkg mutt... the console seemed to be freezed. I killed then the process from another console but the cdrom continued reading from the cd. Trying to umount the device told me that the device was busy but I wasn't using no more the device.
I tried to eject the cdrom manually and the cdrom went out also if it result mounted. Looking at dmesg, I saw this:

hdc: timeout waiting for DMA
hdc: timeout waiting for DMA
hdc: (__ide_dma_test_irq) called while not waiting
hdc: command error: status=0x51 { DriveReady SeekComplete Error }
hdc: command error: error=0x54
end_request: I/O error, dev 16:00 (hdc), sector 644968
hdc: command error: status=0x51 { DriveReady SeekComplete Error }
hdc: command error: error=0x54
end_request: I/O error, dev 16:00 (hdc), sector 644972
hdc: timeout waiting for DMA
hdc: timeout waiting for DMA
hdc: (__ide_dma_test_irq) called while not waiting
hdc: command error: status=0x51 { DriveReady SeekComplete Error }
hdc: command error: error=0x54
end_request: I/O error, dev 16:00 (hdc), sector 644976
hdc: command error: status=0x51 { DriveReady SeekComplete Error }
hdc: command error: error=0x54
end_request: I/O error, dev 16:00 (hdc), sector 644980 [repeated 4-5 times]
hdc: timeout waiting for DMA
hdc: timeout waiting for DMA
hdc: (__ide_dma_test_irq) called while not waiting [again the previous errors]
hdc: irq timeout: status=0xd0 { Busy }
hdc: irq timeout: error=0x00
hdc: ATAPI reset complete
[again the previous errors]
hdc: irq timeout: status=0xd0 { Busy }
hdc: irq timeout: error=0x00
hdc: ATAPI reset complete
hdc: tray open

I suppose the at this point is when I ejected the cdrom manually. The log continues:

end_request: I/O error, dev 16:00 (hdc), sector 645108
hdc: request sense failure: status=0x51 { DriveReady SeekComplete Error }
hdc: request sense failure: error=0x20LastFailedSense 0x02
hdc: tray open
[repeated 5-6 times]
hdc: tray open
end_request: I/O error, dev 16:00 (hdc), sector 671480
hdc: request sense failure: status=0x51 { DriveReady SeekComplete Error }
hdc: request sense failure: error=0x20LastFailedSense 0x02

And nothing more.
Umounting the device from the console now didn't give me any error. Trying to mount some cd again give this:

root@malattia:~# mount /mnt/cdrom/
mount: No medium found

What's happened?
I have the kernel 2.4.22 with slackware 9.1 (default slackware kernel).

hdparm says this:

root@malattia:~# hdparm -i /dev/hdc

/dev/hdc:

Model=36X CD-ROM, FwRev=VER 2.F0, SerialNo=MT1102 Firmware Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic } RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0 BuffType=unknown, BuffSize=0kB, MaxMultSect=0 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0 IORDY=yes, tPIO={min:227,w/IORDY:120}, tDMA={min:120,rec:150} PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 *udma2
AdvancedPM=no

I never got problems with the cd drive, and rebooting the system everything began to run again.
Is this a kernel problem or a my own fault?

Bye

Ivan "kratorius" Giuliani  ::  PGP Public Key ID:
http://kratorius.cjb.net   ::  0x840F429D @ keyserver.linux.it
LUGBari Member             ::