diff options
| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2007-11-27 21:35:52 +0100 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-11-27 21:35:52 +0100 |
| commit | 89613e667f7539defb053795f18653003179cf7e (patch) | |
| tree | 3efcfc63e7b7e999db536955464c361f1e53cb4d | |
| parent | a1d85864d30181a71243193ed01d322dc0618dc6 (diff) | |
ide: don't set PIO mode on pre-EIDE drives
Fix handling of the PIO modes for the pre-EIDE drives that did not support
the PIO Flow Control Transfer Mode value (00001 nnn) of the Set Transfer Mode
feature by skipping the actual mode programming.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
| -rw-r--r-- | drivers/ide/ide-iops.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c index e17a9ee120e..1cdf688a542 100644 --- a/drivers/ide/ide-iops.c +++ b/drivers/ide/ide-iops.c @@ -756,7 +756,7 @@ int ide_driveid_update(ide_drive_t *drive) int ide_config_drive_speed(ide_drive_t *drive, u8 speed) { ide_hwif_t *hwif = drive->hwif; - int error; + int error = 0; u8 stat; // while (HWGROUP(drive)->busy) @@ -767,6 +767,10 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed) hwif->dma_host_off(drive); #endif + /* Skip setting PIO flow-control modes on pre-EIDE drives */ + if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08)) + goto skip; + /* * Don't use ide_wait_cmd here - it will * attempt to set_geometry and recalibrate, @@ -814,6 +818,7 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed) drive->id->dma_mword &= ~0x0F00; drive->id->dma_1word &= ~0x0F00; + skip: #ifdef CONFIG_BLK_DEV_IDEDMA if (speed >= XFER_SW_DMA_0) hwif->dma_host_on(drive); |