From: Alex Elder Date: Thu, 11 Oct 2012 04:19:13 +0000 (-0700) Subject: rbd: zero return code in rbd_dev_image_id() X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a0ea3a40fd20b8c66381f747c454f89d6d1f50d4;p=linux-beck.git rbd: zero return code in rbd_dev_image_id() When rbd_dev_probe() calls rbd_dev_image_id() it expects to get a 0 return code if successful, but it is getting a positive value. The reason is that rbd_dev_image_id() returns the value it gets from rbd_req_sync_exec(), which returns the number of bytes read in as a result of the request. (This ultimately comes from ceph_copy_from_page_vector() in rbd_req_sync_op()). Force the return value to 0 when successful in rbd_dev_image_id(). Do the same in rbd_dev_v2_object_prefix(). Signed-off-by: Alex Elder Reviewed-by: Josh Durgin Reviewed-by: Dan Mick --- diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 4a16464ad5bb..94d613208c4f 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2207,6 +2207,7 @@ static int rbd_dev_v2_object_prefix(struct rbd_device *rbd_dev) dout("%s: rbd_req_sync_exec returned %d\n", __func__, ret); if (ret < 0) goto out; + ret = 0; /* rbd_req_sync_exec() can return positive */ p = reply_buf; rbd_dev->header.object_prefix = ceph_extract_encoded_string(&p, @@ -2900,6 +2901,7 @@ static int rbd_dev_image_id(struct rbd_device *rbd_dev) dout("%s: rbd_req_sync_exec returned %d\n", __func__, ret); if (ret < 0) goto out; + ret = 0; /* rbd_req_sync_exec() can return positive */ p = response; rbd_dev->image_id = ceph_extract_encoded_string(&p,