block: sed-opal: fix u64 short atom length

The length must be given as bytes and not as 4 bit tuples.

Reviewed-by: Scott Bauer <scott.bauer@intel.com>
Signed-off-by: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 4 insertions, 7 deletions

diff --git a/block/sed-opal.c b/block/sed-opal.c
index 36842bfa572e..38411c5c477f 100644
--- a/block/sed-opal.c
+++ b/block/sed-opal.c
@@ -554,15 +554,14 @@ static void add_token_u64(int *err, struct opal_dev *cmd, u64 number)
 
         size_t len;
         int msb;
-        u8 n;
 
         if (!(number & ~TINY_ATOM_DATA_MASK)) {
                 add_token_u8(err, cmd, number);
                 return;
         }
 
-        msb = fls(number);
-        len = DIV_ROUND_UP(msb, 4);
+        msb = fls64(number);
+        len = DIV_ROUND_UP(msb, 8);
 
         if (cmd->pos >= IO_BUFFER_LENGTH - len - 1) {
                 pr_debug("Error adding u64: end of buffer.\n");
@@ -570,10 +569,8 @@ static void add_token_u64(int *err, struct opal_dev *cmd, u64 number)
                 return;
         }
         add_short_atom_header(cmd, false, false, len);
-        while (len--) {
-                n = number >> (len * 8);
-                add_token_u8(err, cmd, n);
-        }
+        while (len--)
+                add_token_u8(err, cmd, number >> (len * 8));
 }
 
 static void add_token_bytestring(int *err, struct opal_dev *cmd,