ide-atapi: split drive-specific functionality in ide_issue_pc

There should be no functionality change resulting from this patch.

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

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index cf2b99c..fa7a70a 100644 (file)
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -564,39 +564,43 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
 
 ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout)
 {
-       struct ide_atapi_pc *pc = drive->pc;
+       struct ide_atapi_pc *pc;
        ide_hwif_t *hwif = drive->hwif;
        ide_expiry_t *expiry = NULL;
        u32 tf_flags;
        u16 bcount;
 
-       /* We haven't transferred any data yet */
-       pc->xferred = 0;
-       pc->cur_pos = pc->buf;
-
        if (dev_is_idecd(drive)) {
                tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL;
                bcount = ide_cd_get_xferlen(hwif->hwgroup->rq);
                expiry = ide_cd_expiry;
+
+               if (drive->dma)
+                       drive->dma = !hwif->dma_ops->dma_setup(drive);
        } else {
+               pc = drive->pc;
+
+               /* We haven't transferred any data yet */
+               pc->xferred = 0;
+               pc->cur_pos = pc->buf;
+
                tf_flags = IDE_TFLAG_OUT_DEVICE;
                bcount = ((drive->media == ide_tape) ?
                                pc->req_xfer :
                                min(pc->req_xfer, 63 * 1024));
-       }
 
-       if (pc->flags & PC_FLAG_DMA_ERROR) {
-               pc->flags &= ~PC_FLAG_DMA_ERROR;
-               ide_dma_off(drive);
-       }
+               if (pc->flags & PC_FLAG_DMA_ERROR) {
+                       pc->flags &= ~PC_FLAG_DMA_ERROR;
+                       ide_dma_off(drive);
+               }
 
-       if (((pc->flags & PC_FLAG_DMA_OK) &&
-               (drive->dev_flags & IDE_DFLAG_USING_DMA)) ||
-           drive->dma)
-               drive->dma = !hwif->dma_ops->dma_setup(drive);
+               if ((pc->flags & PC_FLAG_DMA_OK) &&
+                    (drive->dev_flags & IDE_DFLAG_USING_DMA))
+                       drive->dma = !hwif->dma_ops->dma_setup(drive);
 
-       if (!drive->dma)
-               pc->flags &= ~PC_FLAG_DMA_OK;
+               if (!drive->dma)
+                       pc->flags &= ~PC_FLAG_DMA_OK;
+       }
 
        ide_pktcmd_tf_load(drive, tf_flags, bcount, drive->dma);