From: Jens Axboe <jens.axboe@oracle.com>
Date: Mon, 13 Nov 2006 17:59:01 +0000 (+0000)
Subject: [PATCH] block: Fix bad data direction in SG_IO
X-Git-Tag: v2.6.18.3~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d7e0615152b01b5bd1dd8c9aea5d949e50fed93;p=thirdparty%2Fkernel%2Fstable.git

[PATCH] block: Fix bad data direction in SG_IO

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>
---

diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index b33eda26e2053..ed3d3aec7e9ad 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -246,10 +246,10 @@ static int sg_io(struct file *file, request_queue_t *q,
 		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;
 		}