- struct hd_driveid *id = drive->id;
- ide_hwif_t *hwif = HWIF(drive);
- int xfer_mode = 0;
-
- if (!(id->capability & 1) || !hwif->autodma)
- goto out;
-
- /*
- * Consult the list of known "bad" drives
- */
- if (__ide_dma_bad_drive(drive))
- goto out;
-
- /*
- * Enable DMA on any drive that has multiword DMA
- */
- if (id->field_valid & 2) {
- xfer_mode = ide_max_dma_mode(drive);
- goto out;
- }
-
- /*
- * Consult the list of known "good" drives
- */
- if (__ide_dma_good_drive(drive)) {
- if (id->eide_dma_time > 150)
- goto out;
- xfer_mode = XFER_MW_DMA_1;
- }
-
-out:
- if (xfer_mode == 0)
- return -1;