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-rw-r--r--drivers/ide/ide-atapi.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index c9beda5fca1..e8688c0f864 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -489,7 +489,7 @@ static int ide_delayed_transfer_pc(ide_drive_t *drive)
static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
{
- struct ide_atapi_pc *pc = drive->pc;
+ struct ide_atapi_pc *uninitialized_var(pc);
ide_hwif_t *hwif = drive->hwif;
struct request *rq = hwif->hwgroup->rq;
ide_expiry_t *expiry;
@@ -518,6 +518,8 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
timeout = rq->timeout;
expiry = ide_cd_expiry;
} else {
+ pc = drive->pc;
+
cmd_len = ATAPI_MIN_CDB_BYTES;
/*
@@ -550,9 +552,14 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
ide_set_handler(drive, ide_pc_intr, timeout, expiry);
/* Begin DMA, if necessary */
- if (pc->flags & PC_FLAG_DMA_OK) {
- pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
- hwif->dma_ops->dma_start(drive);
+ if (dev_is_idecd(drive)) {
+ if (drive->dma)
+ hwif->dma_ops->dma_start(drive);
+ } else {
+ if (pc->flags & PC_FLAG_DMA_OK) {
+ pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
+ hwif->dma_ops->dma_start(drive);
+ }
}
/* Send the actual packet */