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| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2009-03-31 20:15:27 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-03-31 20:15:27 +0200 |
| commit | c4199930b119eb9c1ffb102ed57eaac4d4424d08 (patch) | |
| tree | d411514db277035116d7994b65c5c3b4e7c097f1 /drivers/ide/ide-iops.c | |
| parent | 8d64fcd9357798ad0d61f8877de13d5e1b1ab510 (diff) | |
| download | lwn-c4199930b119eb9c1ffb102ed57eaac4d4424d08.tar.gz lwn-c4199930b119eb9c1ffb102ed57eaac4d4424d08.zip | |
ide-iops: only clear DMA words on setting DMA mode
The bytes indicating current DMA mode in the identify data words 62, 63, and 88
should only change on setting a DMA mode, so stop clearing them on setting PIO
mode in ide_config_drive_speed(). While at it, correct SW/MW DMA mode masks...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-iops.c')
| -rw-r--r-- | drivers/ide/ide-iops.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c index 5403e4a44be4..0e62698146b6 100644 --- a/drivers/ide/ide-iops.c +++ b/drivers/ide/ide-iops.c @@ -386,9 +386,11 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed) return error; } - id[ATA_ID_UDMA_MODES] &= ~0xFF00; - id[ATA_ID_MWDMA_MODES] &= ~0x0F00; - id[ATA_ID_SWDMA_MODES] &= ~0x0F00; + if (speed >= XFER_SW_DMA_0) { + id[ATA_ID_UDMA_MODES] &= ~0xFF00; + id[ATA_ID_MWDMA_MODES] &= ~0x0700; + id[ATA_ID_SWDMA_MODES] &= ~0x0700; + } skip: #ifdef CONFIG_BLK_DEV_IDEDMA |