From: Adrian Hunter <ext-adrian.hunter@nokia.com>
Date: Thu, 11 Sep 2008 11:25:44 +0000 (+0300)
Subject: UBIFS: allow for sync_fs when read-only
X-Git-Tag: v2.6.28-rc1~98^2~8
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=bed79935de9a658678f44b88a097367d3b26429f;p=linux-2.6-omap-h63xx.git

UBIFS: allow for sync_fs when read-only

sync_fs can be called even if the file system is mounted
read-only.  Ensure the commit is not run in that case.

Reported-by: Zoltan Sogor <weth@inf.u-szeged.hu>
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
---

diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 7e1f3efdf63..7fd759dde79 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -420,21 +420,22 @@ static int ubifs_sync_fs(struct super_block *sb, int wait)
 	int i, ret = 0, err;
 	long long bud_bytes;
 
-	if (c->jheads)
+	if (c->jheads) {
 		for (i = 0; i < c->jhead_cnt; i++) {
 			err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
 			if (err && !ret)
 				ret = err;
 		}
 
-	/* Commit the journal unless it has too few data */
-	spin_lock(&c->buds_lock);
-	bud_bytes = c->bud_bytes;
-	spin_unlock(&c->buds_lock);
-	if (bud_bytes > c->leb_size) {
-		err = ubifs_run_commit(c);
-		if (err)
-			return err;
+		/* Commit the journal unless it has too little data */
+		spin_lock(&c->buds_lock);
+		bud_bytes = c->bud_bytes;
+		spin_unlock(&c->buds_lock);
+		if (bud_bytes > c->leb_size) {
+			err = ubifs_run_commit(c);
+			if (err)
+				return err;
+		}
 	}
 
 	/*