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.

[[email protected]: coding-style fixes]
Signed-off-by: Doug Chapman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Phillip Lougher <[email protected]>

diff --git a/fs/squashfs/cache.c b/fs/squashfs/cache.c
index 1c4739e33af638bf819278c755e2d656ec64288d..40c98fa6b5d6a779d94bbb6b937a67a8c053d8c7 100644 (file)
--- 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);