ide: add ide_drive_t.dma flag
Borislav Petkov [Mon, 13 Oct 2008 19:39:49 +0000 (21:39 +0200)]
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>

drivers/ide/ide-atapi.c
include/linux/ide.h

index a1d8c35..d557841 100644 (file)
@@ -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) {
index 5a39dab..8247b28 100644 (file)
@@ -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 */