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path: root/drivers/ide/ide-dma.c
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Diffstat (limited to 'drivers/ide/ide-dma.c')
-rw-r--r--drivers/ide/ide-dma.c32
1 files changed, 14 insertions, 18 deletions
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index a5612eadc306..f9c91752f275 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -245,12 +245,11 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode)
case XFER_UDMA_0:
if ((id[ATA_ID_FIELD_VALID] & 4) == 0)
break;
-
+ mask = id[ATA_ID_UDMA_MODES];
if (port_ops && port_ops->udma_filter)
- mask = port_ops->udma_filter(drive);
+ mask &= port_ops->udma_filter(drive);
else
- mask = hwif->ultra_mask;
- mask &= id[ATA_ID_UDMA_MODES];
+ mask &= hwif->ultra_mask;
/*
* avoid false cable warning from eighty_ninty_three()
@@ -261,18 +260,15 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode)
}
break;
case XFER_MW_DMA_0:
- if ((id[ATA_ID_FIELD_VALID] & 2) == 0)
- break;
+ mask = id[ATA_ID_MWDMA_MODES];
if (port_ops && port_ops->mdma_filter)
- mask = port_ops->mdma_filter(drive);
+ mask &= port_ops->mdma_filter(drive);
else
- mask = hwif->mwdma_mask;
- mask &= id[ATA_ID_MWDMA_MODES];
+ mask &= hwif->mwdma_mask;
break;
case XFER_SW_DMA_0:
- if (id[ATA_ID_FIELD_VALID] & 2) {
- mask = id[ATA_ID_SWDMA_MODES] & hwif->swdma_mask;
- } else if (id[ATA_ID_OLD_DMA_MODES] >> 8) {
+ mask = id[ATA_ID_SWDMA_MODES];
+ if (!(mask & ATA_SWDMA2) && (id[ATA_ID_OLD_DMA_MODES] >> 8)) {
u8 mode = id[ATA_ID_OLD_DMA_MODES] >> 8;
/*
@@ -280,8 +276,9 @@ static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode)
* (the maximum allowed mode is XFER_SW_DMA_2)
*/
if (mode <= 2)
- mask = ((2 << mode) - 1) & hwif->swdma_mask;
+ mask = (2 << mode) - 1;
}
+ mask &= hwif->swdma_mask;
break;
default:
BUG();
@@ -398,11 +395,10 @@ int ide_id_dma_bug(ide_drive_t *drive)
if ((id[ATA_ID_UDMA_MODES] >> 8) &&
(id[ATA_ID_MWDMA_MODES] >> 8))
goto err_out;
- } else if (id[ATA_ID_FIELD_VALID] & 2) {
- if ((id[ATA_ID_MWDMA_MODES] >> 8) &&
- (id[ATA_ID_SWDMA_MODES] >> 8))
- goto err_out;
- }
+ } else if ((id[ATA_ID_MWDMA_MODES] >> 8) &&
+ (id[ATA_ID_SWDMA_MODES] >> 8))
+ goto err_out;
+
return 0;
err_out:
printk(KERN_ERR "%s: bad DMA info in identify block\n", drive->name);