From: Doug Chapman <doug.chapman@hp.com>
Date: Wed, 13 May 2009 01:56:39 +0000 (+0100)
Subject: Squashfs: fix breakage when page size > metadata block size
X-Git-Tag: firefly_0821_release~14175^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a37b06d589f2c687a38d07569f4ef97c650fde39;p=firefly-linux-kernel-4.4.55.git

Squashfs: fix breakage when page size > metadata block size

Squashfs is broken on any system where the page size is larger than
the metadata size (8192).  This is easily fixed by ensuring cache->pages
is always > 0.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Doug Chapman <doug.chapman@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
---

diff --git a/fs/squashfs/cache.c b/fs/squashfs/cache.c
index 1c4739e33af6..40c98fa6b5d6 100644
--- a/fs/squashfs/cache.c
+++ b/fs/squashfs/cache.c
@@ -252,6 +252,7 @@ struct squashfs_cache *squashfs_cache_init(char *name, int entries,
 	cache->entries = entries;
 	cache->block_size = block_size;
 	cache->pages = block_size >> PAGE_CACHE_SHIFT;
+	cache->pages = cache->pages ? cache->pages : 1;
 	cache->name = name;
 	cache->num_waiters = 0;
 	spin_lock_init(&cache->lock);