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    SubjectRe: Linux v2.6.22-rc3
    Hi,

    2007/5/26, Linus Torvalds <torvalds@linux-foundation.org>:
    > What more could you possibly want? Some ATA updates? USB suspend problem

    22-rc3 broke the CDROM in my Dell notebook. After I've switched to
    libata som time ago, I've got some delays/timeouts during boot [1].
    But the drive works as expected. With 2.6.22-rc3 I've got the
    following messages during bootup:

    [ 19.343211] ata_piix 0000:00:07.1: version 2.11
    [ 19.343598] scsi0 : ata_piix
    [ 19.344068] scsi1 : ata_piix
    [ 19.344426] ata1: PATA max UDMA/33 cmd 0x000101f0 ctl 0x000103f6
    bmdma 0x00010860 irq 14
    [ 19.345135] ata2: PATA max UDMA/33 cmd 0x00010170 ctl 0x00010376
    bmdma 0x00010868 irq 15
    [ 0.653333] Marking TSC unstable due to: possible TSC halt in C2.
    [ 0.656666] Time: acpi_pm clocksource has been installed.
    [ 0.656666] Switched to NOHz mode on CPU #0
    [ 0.779999] ata1.00: ata_hpa_resize 1: sectors = 78242976,
    hpa_sectors = 78242976
    [ 0.779999] ata1.00: ATA-7: SAMSUNG MP0402H, UC100-14, max UDMA/100
    [ 0.796666] ata1.00: 78242976 sectors, multi 8: LBA48
    [ 0.816666] ata1.00: ata_hpa_resize 1: sectors = 78242976,
    hpa_sectors = 78242976
    [ 0.829999] ata1.00: configured for UDMA/33
    [ 1.376666] Clocksource tsc unstable (delta = -496149826 ns)
    [ 10.866665] ata2: SRST failed (errno=-16)
    [ 20.899997] ata2: SRST failed (errno=-16)
    [ 55.946661] ata2: SRST failed (errno=-16)
    [ 60.966660] ata2: SRST failed (errno=-16)
    [ 60.979993] ata2: reset failed, giving up
    [ 60.993327] scsi 0:0:0:0: Direct-Access ATA SAMSUNG
    MP0402H UC10 PQ: 0 ANSI: 5
    [ 61.009993] sd 0:0:0:0: [sda] 78242976 512-byte hardware sectors (40060 MB)
    [ 61.023327] sd 0:0:0:0: [sda] Write Protect is off
    [ 61.039993] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
    [ 61.039993] sd 0:0:0:0: [sda] Write cache: enabled, read cache:
    enabled, doesn't support DPO or FUA
    [ 61.056660] sd 0:0:0:0: [sda] 78242976 512-byte hardware sectors (40060 MB)
    [ 61.069993] sd 0:0:0:0: [sda] Write Protect is off
    [ 61.086660] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
    [ 61.086660] sd 0:0:0:0: [sda] Write cache: enabled, read cache:
    enabled, doesn't support DPO or FUA
    [ 61.103327] sda: sda1 sda2 sda3 sda4
    [ 61.546660] sd 0:0:0:0: [sda] Attached SCSI disk
    [ 61.563327] sd 0:0:0:0: Attached scsi generic sg0 type 0

    AFAIR the drive, a SAMSUNG CD-ROM SN-124, is somehow misbehaving and
    listed with ATA_HORKAGE_NODMA in the dma blacklist.

    Is there a patch I can apply?

    Thanks,
    Gregor

    [1] http://lkml.org/lkml/2007/3/1/243
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