bug in alim15x3(kernel 2.4.20)

hey

00:00.0 Host bridge: Acer Laboratories Inc. [ALi]: Unknown device 1671 (rev 02)
Subsystem: Hewlett-Packard Company: Unknown device 0027
Flags: bus master, medium devsel, latency 0
Memory at f0000000 (32-bit, prefetchable) [size=128M]
Capabilities: [b0] AGP version 2.0
Capabilities: [a4] Power Management version 1

00:01.0 PCI bridge: Acer Laboratories Inc. [ALi] M5247 (prog-if 00 [Normal decode])

       Flags: bus master, slow devsel, latency 0
       Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
       I/O behind bridge: 00009000-00009fff
       Memory behind bridge: e0100000-e01fffff
       Prefetchable memory behind bridge: e8000000-efffffff

00:02.0 USB Controller: Acer Laboratories Inc. [ALi] M5237 USB (rev 03) (prog-if 10 [OH CI])
Subsystem: Hewlett-Packard Company: Unknown device 0027
Flags: bus master, medium devsel, latency 64, IRQ 9
Memory at e0000000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [60] Power Management version 2

0:04.0 Multimedia audio controller: Acer Laboratories Inc. [ALi]: Unknown device 5451 (rev 02)
Subsystem: Hewlett-Packard Company: Unknown device 0027
Flags: bus master, medium devsel, latency 64, IRQ 5
I/O ports at 1400 [size=256]
Memory at e0001000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [dc] Power Management version 2

00:06.0 Bridge: Acer Laboratories Inc. [ALi] M7101 PMU
Subsystem: Hewlett-Packard Company: Unknown device 0027
Flags: medium devsel

00:07.0 ISA bridge: Acer Laboratories Inc. [ALi] M1533 PCI to ISA Bridge [Aladdin IV]
Subsystem: Hewlett-Packard Company: Unknown device 0027
Flags: bus master, medium devsel, latency 0
Capabilities: [a0] Power Management version 1
00:08.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139 (rev 10)
Subsystem: QUANTA Computer Inc: Unknown device 9904
Flags: bus master, medium devsel, latency 64, IRQ 10
I/O ports at 1800 [size=256]
Memory at e0002000 (32-bit, non-prefetchable) [size=256]

00:0a.0 CardBus bridge: Texas Instruments PCI1410 PC card Cardbus Controller (rev 02)

       Subsystem: Hewlett-Packard Company: Unknown device 0027
       Flags: bus master, medium devsel, latency 168, IRQ 5
       Memory at 10000000 (32-bit, non-prefetchable) [size=4K]
       Bus: primary=00, secondary=02, subordinate=05, sec-latency=176
       Memory window 0: 10400000-107ff000 (prefetchable)
       Memory window 1: 10800000-10bff000
       I/O window 0: 00004000-000040ff
       I/O window 1: 00004400-000044ff
       16-bit legacy interface ports at 0001

00:0b.0 Communication controller: ESS Technology ES2838/2839 SuperLink Modem (rev 01)
Subsystem: Hewlett-Packard Company: Unknown device 0020
Flags: fast devsel, IRQ 11
I/O ports at 1010 [disabled] [size=16]
Capabilities: [c0] Power Management version 2
0:0f.0 IDE interface: Acer Laboratories Inc. [ALi] M5229 IDE (rev c4) (prog-if fa)
Subsystem: Hewlett-Packard Company: Unknown device 0027
Flags: bus master, medium devsel, latency 64
I/O ports at 1000 [size=16]
Capabilities: [60] Power Management version 2

01:00.0 VGA compatible controller: ATI Technologies Inc: Unknown device 4c59 (prog-if 0 0 [VGA])
Subsystem: Hewlett-Packard Company: Unknown device 0027
Flags: stepping, fast Back2Back, 66Mhz, medium devsel, IRQ 11 Memory at e8000000 (32-bit, prefetchable) [size=128M]
I/O ports at 9000 [size=256]
Memory at e0100000 (32-bit, non-prefetchable) [size=64K]
Expansion ROM at <unassigned> [disabled] [size=128K]
Capabilities: [58] AGP version 2.0
Capabilities: [50] Power Management version 2
####
/dev/hda:

Model=IC25N020ATCS04-0, FwRev=CA2OA71A, SerialNo=CSL206D9H1N0MA
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4 BuffType=DualPortCache, BuffSize=1768kB, MaxMultSect=16, MultSect=16 CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=39070080 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4 udma5 AdvancedPM=yes: mode=0x80 (128)
Drive Supports : ATA/ATAPI-5 T13 1321D revision 3 : ATA-2 ATA-3 ATA-4 ATA-5
#####
#here the kernel hang up when i use alim15x3 driver to enable dma ManOwaRR kernel: hdc: timeout waiting for DMA
ManOwaRR kernel: hdc: irq timeout: status=0x58 { DriveReady SeekComplete DataRequest } ManOwaRR kernel: hdc: timeout waiting for DMA
ManOwaRR kernel: hdc: irq timeout: status=0xd0 { Busy }
ManOwaRR kernel: hdc: DMA disabled
ManOwaRR kernel: scsi : aborting command due to timeout : pid 15, scsi0, channel 0, id 0, lun 0 0x28 00 00 00 01 00 00 0$
ManOwaRR kernel: SCSI host 0 abort (pid 15) timed out - resetting\
ManOwaRR kernel: SCSI bus is being reset for host 0 channel 0.
ManOwaRR kernel: hdc: ATAPI reset complete
ManOwaRR -- MARK -

####
please any idea how to fix this and enable dma
####

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Your timeout/reset is on hdc, not hda but you provide only hda info.