If a destination is not provided, jffs2_1pass_read_inode() only returns the length of the file. In this case, avoid reading all the data nodes, and return as soon as the length of the file is known.
Signed-off-by: Mark Tomlinson mark.tomlinson@alliedtelesis.co.nz ---
fs/jffs2/jffs2_1pass.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/fs/jffs2/jffs2_1pass.c b/fs/jffs2/jffs2_1pass.c index b1d6470..2335db1 100644 --- a/fs/jffs2/jffs2_1pass.c +++ b/fs/jffs2/jffs2_1pass.c @@ -719,6 +719,12 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest) } put_fl_mem(jNode, pL->readbuf); } + /* If no destination is provided, we are done. + * Just return the total size. + */ + if (!dest) { + return totalSize; + } #endif
for (b = pL->frag.listHead; b != NULL; b = b->next) {