ide: move check_dma_crc() to ide-dma.c

* Move check_dma_crc() to ide-dma.c and add inline version for
  CONFIG_BLK_DEV_IDEDMA=n case.

* Rename check_dma_crc() to ide_check_dma_crc().

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 7beaf1e9be12..3cf59f2c3928 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -819,6 +819,26 @@ int ide_set_dma(ide_drive_t *drive)
         return 0;
 }
 
+void ide_check_dma_crc(ide_drive_t *drive)
+{
+        u8 mode;
+
+        ide_dma_off_quietly(drive);
+        drive->crc_count = 0;
+        mode = drive->current_speed;
+        /*
+         * Don't try non Ultra-DMA modes without iCRC's.  Force the
+         * device to PIO and make the user enable SWDMA/MWDMA modes.
+         */
+        if (mode > XFER_UDMA_0 && mode <= XFER_UDMA_7)
+                mode--;
+        else
+                mode = XFER_PIO_4;
+        ide_set_xfer_rate(drive, mode);
+        if (drive->current_speed >= XFER_SW_DMA_0)
+                ide_dma_on(drive);
+}
+
 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
 void ide_dma_lost_irq (ide_drive_t *drive)
 {