ext4: Fix deadlock in ext4_write_begin() and ext4_da_write_begin()

[pandora-kernel.git] / fs / ext4 / inode.c

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index cbd2ca9..51cdd13 100644 (file)
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1368,6 +1368,10 @@ retry:
                goto out;
        }
 
+       /* We cannot recurse into the filesystem as the transaction is already
+        * started */
+       flags |= AOP_FLAG_NOFS;
+
        page = grab_cache_page_write_begin(mapping, index, flags);
        if (!page) {
                ext4_journal_stop(handle);
@@ -1377,7 +1381,7 @@ retry:
        *pagep = page;
 
        ret = block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
-                                                       ext4_get_block);
+                               ext4_get_block);
 
        if (!ret && ext4_should_journal_data(inode)) {
                ret = walk_page_buffers(handle, page_buffers(page),
@@ -2667,6 +2671,9 @@ retry:
                ret = PTR_ERR(handle);
                goto out;
        }
+       /* We cannot recurse into the filesystem as the transaction is already
+        * started */
+       flags |= AOP_FLAG_NOFS;
 
        page = grab_cache_page_write_begin(mapping, index, flags);
        if (!page) {