lib/decompress_unlz4: change module to work with new LZ4 module version

Update the unlz4 wrapper to work with the updated LZ4 kernel module
version.

Link: http://lkml.kernel.org/r/1486321748-19085-3-git-send-email-4sschmid@informatik.uni-hamburg.de
Signed-off-by: Sven Schmidt <4sschmid@informatik.uni-hamburg.de>
Cc: Bongkyu Kim <bongkyu.kim@lge.com>
Cc: Rui Salvaterra <rsalvaterra@gmail.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: David S. Miller <davem@davemloft.net>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 5 deletions

diff --git a/lib/decompress_unlz4.c b/lib/decompress_unlz4.c
index 036fc882cd72..1b0baf3008ea 100644
--- a/lib/decompress_unlz4.c
+++ b/lib/decompress_unlz4.c
@@ -72,7 +72,7 @@ STATIC inline int INIT unlz4(u8 *input, long in_len,
                 error("NULL input pointer and missing fill function");
                 goto exit_1;
         } else {
-                inp = large_malloc(lz4_compressbound(uncomp_chunksize));
+                inp = large_malloc(LZ4_compressBound(uncomp_chunksize));
                 if (!inp) {
                         error("Could not allocate input buffer");
                         goto exit_1;
@@ -136,7 +136,7 @@ STATIC inline int INIT unlz4(u8 *input, long in_len,
                         inp += 4;
                         size -= 4;
                 } else {
-                        if (chunksize > lz4_compressbound(uncomp_chunksize)) {
+                        if (chunksize > LZ4_compressBound(uncomp_chunksize)) {
                                 error("chunk length is longer than allocated");
                                 goto exit_2;
                         }
@@ -152,11 +152,14 @@ STATIC inline int INIT unlz4(u8 *input, long in_len,
                         out_len -= dest_len;
                 } else
                         dest_len = out_len;
-                ret = lz4_decompress(inp, &chunksize, outp, dest_len);
+
+                ret = LZ4_decompress_fast(inp, outp, dest_len);
+                chunksize = ret;
 #else
                 dest_len = uncomp_chunksize;
-                ret = lz4_decompress_unknownoutputsize(inp, chunksize, outp,
-                                &dest_len);
+
+                ret = LZ4_decompress_safe(inp, outp, chunksize, dest_len);
+                dest_len = ret;
 #endif
                 if (ret < 0) {
                         error("Decoding failed");