ide-cd: fix DMA for non bio-backed requests
Borislav Petkov [Mon, 2 Feb 2009 19:12:21 +0000 (20:12 +0100)]
This one fixes http://bugzilla.kernel.org/show_bug.cgi?id=12320.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-cd.c
drivers/ide/ide-io.c

index cae6937..0bfeb0c 100644 (file)
@@ -787,6 +787,9 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
                if (blk_fs_request(rq)) {
                        ide_end_request(drive, 1, rq->nr_sectors);
                        return ide_stopped;
+               } else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
+                       ide_end_request(drive, 1, 1);
+                       return ide_stopped;
                }
                goto end_request;
        }
index cc16331..9ee51ad 100644 (file)
@@ -418,11 +418,14 @@ void ide_map_sg(ide_drive_t *drive, struct request *rq)
        ide_hwif_t *hwif = drive->hwif;
        struct scatterlist *sg = hwif->sg_table;
 
-       if (rq->cmd_type != REQ_TYPE_ATA_TASKFILE) {
-               hwif->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
-       } else {
+       if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
                sg_init_one(sg, rq->buffer, rq->nr_sectors * SECTOR_SIZE);
                hwif->sg_nents = 1;
+       } else if (!rq->bio) {
+               sg_init_one(sg, rq->data, rq->data_len);
+               hwif->sg_nents = 1;
+       } else {
+               hwif->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
        }
 }