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: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c
index 48e8fee9f2d4f8aa6bacf4243694a430b53fdae9..94f6ae2bd0ce2b4797e4822ca06608796aa7d6fe 100644 (file)
--- 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) {