[PATCH] ceph: Don't forget the 'up_read(&osdc->map_sem)' if met error.

[majianpeng]

Signed-off-by: Jianpeng Ma <majianp...@gmail.com>
---
 fs/ceph/ioctl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c
index e0b4ef3..a5ce62e 100644
--- a/fs/ceph/ioctl.c
+++ b/fs/ceph/ioctl.c
@@ -196,8 +196,10 @@ static long ceph_ioctl_get_dataloc(struct file *file, void 
__user *arg)
        r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len,
                                          &dl.object_no, &dl.object_offset,
                                          &olen);
-       if (r < 0)
+       if (r < 0) {
+               up_read(&osdc->map_sem);
                return -EIO;
+       }
        dl.file_offset -= dl.object_offset;
        dl.object_size = ceph_file_layout_object_size(ci->i_layout);
        dl.block_size = ceph_file_layout_su(ci->i_layout);
-- 
1.8.1.2