ide: add ide_drive_t.dma flag

This flag is to accomodate ide-cd functionality into ide atapi.

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>

2 files changed, 6 insertions, 4 deletions

diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index a1d8c3557a42..d55784173a79 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -545,7 +545,7 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout,
         struct ide_atapi_pc *pc = drive->pc;
         ide_hwif_t *hwif = drive->hwif;
         u16 bcount;
-        u8 dma = 0, scsi = !!(drive->dev_flags & IDE_DFLAG_SCSI);
+        u8 scsi = !!(drive->dev_flags & IDE_DFLAG_SCSI);
 
         /* We haven't transferred any data yet */
         pc->xferred = 0;
@@ -566,15 +566,16 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout,
             (drive->dev_flags & IDE_DFLAG_USING_DMA)) {
                 if (scsi)
                         hwif->sg_mapped = 1;
-                dma = !hwif->dma_ops->dma_setup(drive);
+                drive->dma = !hwif->dma_ops->dma_setup(drive);
                 if (scsi)
                         hwif->sg_mapped = 0;
         }
 
-        if (!dma)
+        if (!drive->dma)
                 pc->flags &= ~PC_FLAG_DMA_OK;
 
-        ide_pktcmd_tf_load(drive, scsi ? 0 : IDE_TFLAG_OUT_DEVICE, bcount, dma);
+        ide_pktcmd_tf_load(drive, scsi ? 0 : IDE_TFLAG_OUT_DEVICE, bcount,
+                           drive->dma);
 
         /* Issue the packet command */
         if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 5a39dab2cc91..8247b286838d 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -603,6 +603,7 @@ struct ide_drive_s {
         u8      select;                 /* basic drive/head select reg value */
         u8      retry_pio;              /* retrying dma capable host in pio */
         u8      waiting_for_dma;        /* dma currently in progress */
+        u8      dma;                    /* atapi dma flag */
 
         u8      quirk_list;     /* considered quirky, set for a specific host */
         u8      init_speed;     /* transfer rate set at boot */