OpenWrt – Rev 1

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From: Gabor Juhos <juhosg@openwrt.org>
Subject: fs: ubifs: fix default compression selection in ubifs

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
---
 fs/ubifs/sb.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

--- a/fs/ubifs/sb.c
+++ b/fs/ubifs/sb.c
@@ -63,6 +63,17 @@
 /* Default time granularity in nanoseconds */
 #define DEFAULT_TIME_GRAN 1000000000
 
+static int get_default_compressor(void)
+{
+       if (ubifs_compr_present(UBIFS_COMPR_LZO))
+               return UBIFS_COMPR_LZO;
+
+       if (ubifs_compr_present(UBIFS_COMPR_ZLIB))
+               return UBIFS_COMPR_ZLIB;
+
+       return UBIFS_COMPR_NONE;
+}
+
 /**
  * create_default_filesystem - format empty UBI volume.
  * @c: UBIFS file-system description object
@@ -186,7 +197,7 @@ static int create_default_filesystem(str
        if (c->mount_opts.override_compr)
                sup->default_compr = cpu_to_le16(c->mount_opts.compr_type);
        else
-               sup->default_compr = cpu_to_le16(UBIFS_COMPR_LZO);
+               sup->default_compr = cpu_to_le16(get_default_compressor());
 
        generate_random_uuid(sup->uuid);