[patch 25/30] block: Fix bad data direction in SG_IO

[Chris Wright <chrisw@sous-sol.org>]

-stable review patch.  If anyone has any objections, please let us know.
------------------

From: Jens Axboe <jens.axboe@oracle.com>

Contrary to what the name misleads you to believe, SG_DXFER_TO_FROM_DEV
is really just a normal read seen from the device side.

This patch fixes http://lkml.org/lkml/2006/10/13/100

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---

 block/scsi_ioctl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-2.6.18.2.orig/block/scsi_ioctl.c
+++ linux-2.6.18.2/block/scsi_ioctl.c
@@ -246,10 +246,10 @@ static int sg_io(struct file *file, requ
 		switch (hdr->dxfer_direction) {
 		default:
 			return -EINVAL;
-		case SG_DXFER_TO_FROM_DEV:
 		case SG_DXFER_TO_DEV:
 			writing = 1;
 			break;
+		case SG_DXFER_TO_FROM_DEV:
 		case SG_DXFER_FROM_DEV:
 			break;
 		}

--
-
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