Hello, i wrote:
The IDE code assumed for years that the but 1 of the identify data word 53 also covers SW/MW DMA information in words 62 and 63 but is has always covered only words 64 thru 70, with words 62 and 63 being defined by the original ATA spec., not by ATA-2... This fix however should only concern *very* old hard disks and rather old CF cards... Signed-off-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx> --- This patch is against the recent Linus' tree... drivers/ide/ide-dma-sff.c | 5 ++--- drivers/ide/ide-dma.c | 32 ++++++++++++++------------------ 2 files changed, 16 insertions(+), 21 deletions(-) Index: linux-2.6/drivers/ide/ide-dma-sff.c =================================================================== --- linux-2.6.orig/drivers/ide/ide-dma-sff.c +++ linux-2.6/drivers/ide/ide-dma-sff.c @@ -38,9 +38,8 @@ int config_drive_for_dma(ide_drive_t *dr * Enable DMA on any drive that has mode2 DMA * (multi or single) enabled */ - if (id[ATA_ID_FIELD_VALID] & 2) /* regular DMA */ - if ((id[ATA_ID_MWDMA_MODES] & 0x404) == 0x404 || - (id[ATA_ID_SWDMA_MODES] & 0x404) == 0x404) + if ((id[ATA_ID_MWDMA_MODES] & 0x404) == 0x404 || + (id[ATA_ID_SWDMA_MODES] & 0x404) == 0x404) return 1;
Oops, this needs to be moved to the left. I'll repost. MBR, Sergei -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
