[PATCH] zfs: fix function 'zlib_decompress' pointlessly calling itself

[WHR]

In order to prevent crashing due to infinite recursion and actually
decompress the requested data, call the zlib function 'uncompress'
instead.

Signed-off-by: WHR <msl0000023...@gmail.com>

---
v2:
Resubmit with diff content in plain text.


diff --git a/fs/zfs/zfs.c b/fs/zfs/zfs.c
index bfc11fa667..4896cc18ef 100644
--- a/fs/zfs/zfs.c
+++ b/fs/zfs/zfs.c
@@ -17,6 +17,7 @@
 #include <linux/time.h>
 #include <linux/ctype.h>
 #include <asm/byteorder.h>
+#include <u-boot/zlib.h>
 #include "zfs_common.h"
 #include "div64.h"
 
@@ -183,7 +184,8 @@ static int
 zlib_decompress(void *s, void *d,
                                uint32_t slen, uint32_t dlen)
 {
-       if (zlib_decompress(s, d, slen, dlen) < 0)
+       uLongf z_dest_len = dlen;
+       if (uncompress(d, &z_dest_len, s, slen) != Z_OK)
                return ZFS_ERR_BAD_FS;
        return ZFS_ERR_NONE;
 }