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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-01-26 00:17:18 +0300
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-01-26 00:17:18 +0300
commit4db90a145292327b95b03f6dcd3352327235cc36 (patch)
treec48ba5fc31e27d6fbdb8883151bdf237e7eb1920 /drivers/ide/ide-lib.c
parent428c6440ef933a3d9df5adfeb2cbb3ea7ebb6a68 (diff)
downloadlinux-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.c6
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);
}