Larry Finger writes:
> Sometime since v2.6.28, one of my systems started getting libata
> errors for my CD drive.
>
> I have started bisecting this problem, but that system is very slow so
> it will likely take a while.
>
> The ide/ata parts of the dmesg output:
>
> =============================
>
> SCSI subsystem initialized
> libata version 3.00 loaded.
> pata_ali 0000:00:0f.0: can't derive routing for PCI INT A
> pata_ali 0000:00:0f.0: setting latency timer to 64
> scsi0 : pata_ali
> scsi1 : pata_ali
> ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xfc90 irq 14
> ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xfc98 irq 15
> ata1.00: ATA-6: HTS541010G9AT00, MBZOA60A, max UDMA/100
> ata1.00: 195371568 sectors, multi 16: LBA48
> ata1.00: configured for MWDMA2
> scsi 0:0:0:0: Direct-Access ATA HTS541010G9AT00 MBZO PQ: 0
> ANSI: 5
> ata2.00: ATAPI: SR242S, z03, max MWDMA2
> ata2.00: WARNING: ATAPI DMA disabled for reliablity issues. It can be
> enabled
> ata2.00: WARNING: via pata_ali.atapi_dma modparam or corresponding
> sysfs node.
> ata2.00: configured for PIO4
> scsi 1:0:0:0: CD-ROM MITSUMI CD-ROM SR242S !A z03 PQ: 0
> ANSI: 5
> Uniform Multi-Platform E-IDE driver
> BIOS EDD facility v0.16 2004-Jun-25, 1 devices found
> udevd version 128 started
> ACPI: EC: missing confirmations, switch off interrupt mode.
> Driver 'sd' needs updating - please use bus_type methods
> sd 0:0:0:0: [sda] 195371568 512-byte hardware sectors: (100 GB/93.1 GiB)
> sd 0:0:0:0: [sda] Write Protect is off
> sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
> sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't
> support DPO or FUA
> sd 0:0:0:0: [sda] 195371568 512-byte hardware sectors: (100 GB/93.1 GiB)
> sd 0:0:0:0: [sda] Write Protect is off
> sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
> sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't
> support DPO or FUA
> sda1 sda2 sda3 sda4
> sd 0:0:0:0: [sda] Attached SCSI disk
> ACPI: PCI Interrupt Link [LNK5] enabled at IRQ 9
> PCI: setting IRQ 9 as level-triggered
> kjournald starting. Commit interval 5 seconds
> EXT3 FS on sda3, internal journal
> EXT3-fs: mounted filesystem with ordered data mode.
> EXT3 (no)acl options not supported
> EXT3 (no)user_xattr options not supported
> udevd version 128 started
> pci_hotplug: PCI Hot Plug PCI Core version: 0.5
> sd 0:0:0:0: Attached scsi generic sg0 type 0
> scsi 1:0:0:0: Attached scsi generic sg1 type 5
> shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
> Driver 'sr' needs updating - please use bus_type methods
> ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
> cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> res 51/20:03:00:00:00/00:00:00:00:00/a0 Emask 0x3 (HSM violation)
> ata2.00: status: { DRDY ERR }
> ata2: soft resetting link
> ata2.00: configured for PIO4
> ata2: EH complete
> sr0: scsi3-mmc drive: 24x/24x cd/rw xa/form2 cdda tray
> Uniform CD-ROM driver Revision: 3.20
> sr 1:0:0:0: Attached scsi CD-ROM sr0
> ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
> ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
> cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> res 51/20:03:00:00:00/00:00:00:00:00/a0 Emask 0x3 (HSM violation)
> ata2.00: status: { DRDY ERR }
> ata2: soft resetting link
pata_ali is one of the drivers that got converted to doing 32-bit PIO.
Please try this <http://marc.info/?l=linux-kernel&m=123254501314058&w=2>
patch. It's known to fix similar problems seen with ata_piix.
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