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>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 3eab1c6c9b31..317ec62c33d4 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;