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    SubjectRe: PATCH: Fix broken PIO with libata
    Tejun Heo wrote:
    > Alan Cox wrote:
    >> #2 The core sets ATA_DFLAG_PIO to indicate PIO commands should be used
    >> on this channel. This same information is available in dev->dma_mode but
    >> for some reason we get two sources of the info. The ATA_DFLAG_PIO is set
    >> once during setup and then cleared but not re-computed by the revalidate
    >> function. This causes DMA commands to be issued when PIO would be and
    >> usually an Oops or hang
    > Hmmm... I tried to fix this problem in the following commit. With it,
    > ATA_DFLAG_PIO isn't cleared over ata_dev_configure(). Only
    > ata_dev_set_mode() is allowed to diddle with it and does about the same
    > thing as your patch does.

    I presume he's looking at what users will hit when 2.6.17 is released...


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      Last update: 2006-05-16 19:13    [W:0.035 / U:4.932 seconds]
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