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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>
This commit is contained in:
Borislav Petkov 2008-10-13 21:39:49 +02:00 committed by Bartlomiej Zolnierkiewicz
parent 35d9b17fe2
commit 0a9b6f8864
2 changed files with 6 additions and 4 deletions
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9
drivers/ide/ide-atapi.c
View 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) {

1
include/linux/ide.h
View 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 */