[PATCH] ceph: Add check returned value on func ceph_calc_ceph_pg.

[majianpeng <majianpeng@xxxxxxxxx>]

Func ceph_calc_ceph_pg maybe failed.So add check for returned value.

Signed-off-by: Jianpeng Ma <majianpeng@xxxxxxxxx>
---
 fs/ceph/ioctl.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c
index e0b4ef3..8c463dd 100644
--- a/fs/ceph/ioctl.c
+++ b/fs/ceph/ioctl.c
@@ -209,8 +209,12 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg)
 	snprintf(dl.object_name, sizeof(dl.object_name), "%llx.%08llx",
 		 ceph_ino(inode), dl.object_no);
 
-	ceph_calc_ceph_pg(&pgid, dl.object_name, osdc->osdmap,
-		ceph_file_layout_pg_pool(ci->i_layout));
+	r = ceph_calc_ceph_pg(&pgid, dl.object_name, osdc->osdmap,
+				ceph_file_layout_pg_pool(ci->i_layout));
+	if (r < 0) {
+		up_read(&osdc->map_sem);
+		return r;
+	}
 
 	dl.osd = ceph_calc_pg_primary(osdc->osdmap, pgid);
 	if (dl.osd >= 0) {
-- 
1.8.1.2


Thanks!
Jianpeng Ma?韬{.n?????%??檩??w?{.n????u朕?Ф?塄}?财??j:+v??????2??璀??摺?囤??z夸z罐?+?????w棹f