From: David S. Miller <davem@davemloft.net>
Date: Thu, 14 Feb 2013 19:49:01 +0000 (-0800)
Subject: sunvdc: Fix off-by-one in generic_request().
X-Git-Tag: v3.4.34~44
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5cf5b734496e73c30f43833138078ee7884ec725;p=karo-tx-linux.git

sunvdc: Fix off-by-one in generic_request().

[ Upstream commit f4d9605434c0fd4cc8639bf25cfc043418c52362 ]

The 'operations' bitmap corresponds one-for-one with the operation
codes, no adjustment is necessary.

Reported-by: Mark Kettenis <mark.kettenis@xs4all.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c
index 9dcf76a10bb6..31dd45177a7a 100644
--- a/drivers/block/sunvdc.c
+++ b/drivers/block/sunvdc.c
@@ -461,7 +461,7 @@ static int generic_request(struct vdc_port *port, u8 op, void *buf, int len)
 	int op_len, err;
 	void *req_buf;
 
-	if (!(((u64)1 << ((u64)op - 1)) & port->operations))
+	if (!(((u64)1 << (u64)op) & port->operations))
 		return -EOPNOTSUPP;
 
 	switch (op) {