[2.5.44] IDE cdrom DMA errors

Hello,

With 2.5.44 I have encountered DMA errors when using my cdrom device. In 2.5.40 it worked fine.

cdrom:
/dev/hdc:
Model=SAMSUNG CD-ROM SCR-2438, FwRev=zd023, SerialNo= Config={ SpinMotCtl 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=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 AdvancedPM=no

removable ATA device, with non-removable media
Standards:
Likely used: 1
Configuration:

        Logical         max     current
        cylinders       0       0
        heads           0       0
        sectors/track   0       0
        bytes/track:    0
        bytes/sector:   0

LBA user addressable sectors = 0
Capabilities:
no IORDY
Cannot perform double-word IO
r/w multiple sector transfer: not supported
DMA: not supported
PIO: pio0

IDE chipset:
00:07.1 IDE interface: Intel Corp. 82371AB/EB/MB PIIX4 IDE (rev 01) (prog-if 80 [Master])
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-

        Latency: 32
        Region 4: I/O ports at 0860 [size=16]

Errors when trying to read some files from a disk:

end_request: I/O error, dev 16:00, sector 0
end_request: I/O error, dev 16:00, sector 0
hdc: drive_cmd: status=0x51 { DriveReady SeekComplete Error }
hdc: drive_cmd: error=0x04Aborted Command
hdc: lost interrupt
hdc: DMA interrupt recovery
hdc: lost interrupt
hdc: status timeout: status=0xd0 { Busy }
hdc: status timeout: error=0x00
hdc: DMA disabled
hdc: drive not ready for command
hdc: ATAPI reset complete
Buffer I/O error on device ide1(22,0), logical block 146
ide-cd: hard_nr_sectors differs from nr_sectors! 248 252

As a result, trying to read anything from the drive results in a sort of 'lockup' of the drive, while it tries to get the data but constantly fails. The only way to get out of this deadlock is by rebooting the machine.

Wit, n.:
	The salt with which the American Humorist spoils his cookery
... by leaving it out.
		-- Ambrose Bierce, "The Devil's Dictionary"