ide: add IDE_HFLAG_ABUSE_SET_DMA_MODE host flag

[safe/jmp/linux-2.6] / drivers / ide / ide-lib.c

diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c
index 8649db3..a3bd8e8 100644 (file)
--- 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);
 }