ide: fix pre-EIDE SWDMA support

If the word 62 is not defined use the word 52 to get SWDMA mask
in ide_get_mode_mask().
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent ecea5730
......@@ -702,8 +702,22 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base)
mask = id->dma_mword & hwif->mwdma_mask;
break;
case XFER_SW_DMA_0:
if (id->field_valid & 2)
if (id->field_valid & 2) {
mask = id->dma_1word & hwif->swdma_mask;
} else if (id->tDMA) {
/*
* ide_fix_driveid() doesn't convert ->tDMA to the
* CPU endianness so we need to do it here
*/
u8 mode = le16_to_cpu(id->tDMA);
/*
* if the mode is valid convert it to the mask
* (the maximum allowed mode is XFER_SW_DMA_2)
*/
if (mode <= 2)
mask = ((2 << mode) - 1) & hwif->swdma_mask;
}
break;
default:
BUG();
......
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