From: Phillip Lougher <phillip@lougher.demon.co.uk>
Date: Sun, 4 Apr 2010 21:20:58 +0000 (+0100)
Subject: squashfs: fix locking bug in zlib wrapper
X-Git-Tag: firefly_0821_release~9833^2~2271^2~3
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=792590c72376649b4e315df386fd208b83db05b9;p=firefly-linux-kernel-4.4.55.git

squashfs: fix locking bug in zlib wrapper

Fix locking bug in zlib wrapper introduced by recent decompressor changes.

Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
---

diff --git a/fs/squashfs/zlib_wrapper.c b/fs/squashfs/zlib_wrapper.c
index 15a03d0fb9f3..7a603874e483 100644
--- a/fs/squashfs/zlib_wrapper.c
+++ b/fs/squashfs/zlib_wrapper.c
@@ -128,8 +128,9 @@ static int zlib_uncompress(struct squashfs_sb_info *msblk, void **buffer,
 		goto release_mutex;
 	}
 
+	length = stream->total_out;
 	mutex_unlock(&msblk->read_data_mutex);
-	return stream->total_out;
+	return length;
 
 release_mutex:
 	mutex_unlock(&msblk->read_data_mutex);