lib: correct 842 decompress for 32 bit

Avoid 64 bit mod operation, which won't work on 32 bit systems.
Simple subtraction can be used instead in this case.

Reported-By: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/lib/842/842_decompress.c b/lib/842/842_decompress.c
index dbeb058..5446ff0 100644 (file)
--- a/lib/842/842_decompress.c
+++ b/lib/842/842_decompress.c
@@ -185,7 +185,7 @@ static int __do_index(struct sw842_param *p, u8 size, u8 bits, u64 fsize)
                /* this is where the current fifo is */
                u64 section = round_down(total, fsize);
                /* the current pos in the fifo */
-               u64 pos = total % fsize;
+               u64 pos = total - section;
 
                /* if the offset is past/at the pos, we need to
                 * go back to the last fifo section