diff options
Diffstat (limited to 'drivers/ide/ide-atapi.c')
| -rw-r--r-- | drivers/ide/ide-atapi.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c index f72b5a675435..2b9ac2106674 100644 --- a/drivers/ide/ide-atapi.c +++ b/drivers/ide/ide-atapi.c @@ -631,18 +631,23 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive) struct ide_atapi_pc *pc; ide_hwif_t *hwif = drive->hwif; ide_expiry_t *expiry = NULL; + struct request *rq = hwif->rq; unsigned int timeout; u32 tf_flags; u16 bcount; if (dev_is_idecd(drive)) { tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL; - bcount = ide_cd_get_xferlen(hwif->rq); + bcount = ide_cd_get_xferlen(rq); expiry = ide_cd_expiry; timeout = ATAPI_WAIT_PC; - if (drive->dma) - drive->dma = !hwif->dma_ops->dma_setup(drive); + if (drive->dma) { + if (ide_build_sglist(drive, rq)) + drive->dma = !hwif->dma_ops->dma_setup(drive); + else + drive->dma = 0; + } } else { pc = drive->pc; @@ -661,8 +666,12 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive) } if ((pc->flags & PC_FLAG_DMA_OK) && - (drive->dev_flags & IDE_DFLAG_USING_DMA)) - drive->dma = !hwif->dma_ops->dma_setup(drive); + (drive->dev_flags & IDE_DFLAG_USING_DMA)) { + if (ide_build_sglist(drive, rq)) + drive->dma = !hwif->dma_ops->dma_setup(drive); + else + drive->dma = 0; + } if (!drive->dma) pc->flags &= ~PC_FLAG_DMA_OK; |