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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-01-26 00:17:18 +0300 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2008-01-26 00:17:18 +0300 |
| commit | 4db90a145292327b95b03f6dcd3352327235cc36 (patch) | |
| tree | c48ba5fc31e27d6fbdb8883151bdf237e7eb1920 /drivers/ide/ide-lib.c | |
| parent | 428c6440ef933a3d9df5adfeb2cbb3ea7ebb6a68 (diff) | |
| download | linux-4db90a145292327b95b03f6dcd3352327235cc36.tar.xz | |
ide: add IDE_HFLAG_ABUSE_SET_DMA_MODE host flag
* Add IDE_HFLAG_ABUSE_SET_DMA_MODE host flag and use it to decide
what to do with transfer modes < XFER_PIO_0 in ide_set_xfer_rate().
* Set IDE_HFLAG_ABUSE_SET_DMA_MODE in host drivers that need it
(aec62xx, amd74xx, cs5520, cs5535, hpt34x, hpt366, pdc202xx_old,
serverworks, tc86c001 and via82cxxx) and cleanup ->set_dma_mode
methods in host drivers that don't (IDE core code guarantees that
->set_dma_mode will be called only for modes which are present
in SWDMA/MWDMA/UDMA masks).
While at it:
* Add IDE_HFLAGS_HPT34X/HPT3XX/PDC202XX/SVWKS define in
hpt34x/hpt366/pdc202xx_old/serverworks host driver.
There should be no functionality changes caused by this patch.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-lib.c')
| -rw-r--r-- | drivers/ide/ide-lib.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c index 8649db33f67d..a3bd8e8ed6b0 100644 --- a/drivers/ide/ide-lib.c +++ b/drivers/ide/ide-lib.c @@ -441,6 +441,12 @@ int ide_set_xfer_rate(ide_drive_t *drive, u8 rate) * case could happen iff the transfer mode has already been set on * the device by ide-proc.c::set_xfer_rate()). */ + if (rate < XFER_PIO_0) { + if (hwif->host_flags & IDE_HFLAG_ABUSE_SET_DMA_MODE) + return ide_set_dma_mode(drive, rate); + else + return ide_config_drive_speed(drive, rate); + } return ide_set_dma_mode(drive, rate); } |