According to the Compact Flash specification r4.1, PIO modes 5 and 6 do not use iordy. Signed-off-by: David Daney <ddaney@xxxxxxxxxxxxxxxxxx> --- drivers/ata/libata-core.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 1be2dde..b4a35d8 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1923,6 +1923,10 @@ unsigned int ata_pio_need_iordy(const struct ata_device *adev) as the caller should know this */ if (adev->link->ap->flags & ATA_FLAG_NO_IORDY) return 0; + /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */ + if (ata_id_is_cfa(adev->id) + && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6)) + return 0; /* PIO3 and higher it is mandatory */ if (adev->pio_mode > XFER_PIO_2) return 1; -- 1.5.6.5
