[PATCH] [JFFS2] Fix return value from jffs2_do_readpage_nolock()

[Anders Grafström]

[JFFS2] Fix return value from jffs2_do_readpage_nolock()

This fixes "kernel BUG at fs/jffs2/file.c:251!".
This pseudocode hopefully illustrates the scenario that triggers it:

jffs2_write_begin {
     jffs2_do_readpage_nolock {
         jffs2_read_inode_range {
             jffs2_read_dnode {
                 Data CRC 33c102e9 != calculated CRC 0ef77e7b for node at 005d42e4
                 return -EIO;
             }
         }
         ClearPageUptodate(pg);
         return 0;
     }
}

jffs2_write_end {
     BUG_ON(!PageUptodate(pg));
}

Signed-off-by: Anders Grafström <grfstrm at users.sourceforge.net>
---

This issue has resurfaced on linux-mtd a couple of times now.
So here's the patch for it once more. This time with a proper commit message.

 fs/jffs2/file.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 5edc2bf..23c9475 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -99,7 +99,7 @@ static int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg)
 	kunmap(pg);

 	D2(printk(KERN_DEBUG "readpage finished\n"));
-	return 0;
+	return ret;
 }

 int jffs2_do_readpage_unlock(struct inode *inode, struct page *pg)