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authorBorislav Petkov <petkovbb@gmail.com>2009-03-13 21:16:12 +0100
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-03-13 21:16:12 +0100
commit3eb76c1ccde496c3c0bfda23d1c803e40b762ce6 (patch)
tree2a1524a72a5005c512d4f45696d7cde964f7f457
parent041b62374c7fedc11a8a1eeda2868612d3d1436c (diff)
ide-floppy: do not map dataless cmds to an sg
since it fails the virt_to_page() translation check with DEBUG_VIRTUAL enabled. Signed-off-by: Borislav Petkov <petkovbb@gmail.com> [bart: backport to Linus' tree] Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
-rw-r--r--drivers/ide/ide-atapi.c12
-rw-r--r--drivers/ide/ide-floppy.c6
2 files changed, 16 insertions, 2 deletions
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index e96c0126059..e9d042dba0e 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -140,6 +140,12 @@ static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
rq->cmd_flags |= REQ_PREEMPT;
rq->buffer = (char *)pc;
rq->rq_disk = disk;
+
+ if (pc->req_xfer) {
+ rq->data = pc->buf;
+ rq->data_len = pc->req_xfer;
+ }
+
memcpy(rq->cmd, pc->c, 12);
if (drive->media == ide_tape)
rq->cmd[13] = REQ_IDETAPE_PC1;
@@ -159,6 +165,12 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->buffer = (char *)pc;
+
+ if (pc->req_xfer) {
+ rq->data = pc->buf;
+ rq->data_len = pc->req_xfer;
+ }
+
memcpy(rq->cmd, pc->c, 12);
if (drive->media == ide_tape)
rq->cmd[13] = REQ_IDETAPE_PC1;
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 3eab1c6c9b3..317ec62c33d 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -327,8 +327,10 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
return ide_stopped;
}
- ide_init_sg_cmd(drive, rq);
- ide_map_sg(drive, rq);
+ if (blk_fs_request(rq) || pc->req_xfer) {
+ ide_init_sg_cmd(drive, rq);
+ ide_map_sg(drive, rq);
+ }
pc->sg = hwif->sg_table;
pc->sg_cnt = hwif->sg_nents;