ide-cd: fix DMA for non bio-backed requests

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>

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index cae69372cf45c81e51bbe14b57aa08e3f3466f94..0bfeb0c79d6e8e172cdbb5fd3af9a9df084351c5 100644 (file)
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -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;
        }

diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index cc163319dfbdbe1812cb00c6a9fb0e72b957eda6..9ee51adf567faefd6ade2873a41444a1d44ca961 100644 (file)
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -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);
        }
 }