zram: add set_max_streams knob

[firefly-linux-kernel-4.4.55.git] / drivers / block / rbd.c

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index bf8d13a1d08c40bdc6f15a79edfec187e9449464..7e3f45105f1189b13c87f7fafa8e35da127327e2 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1385,6 +1385,14 @@ static bool obj_request_exists_test(struct rbd_obj_request *obj_request)
        return test_bit(OBJ_REQ_EXISTS, &obj_request->flags) != 0;
 }
 
+static bool obj_request_overlaps_parent(struct rbd_obj_request *obj_request)
+{
+       struct rbd_device *rbd_dev = obj_request->img_request->rbd_dev;
+
+       return obj_request->img_offset <
+           round_up(rbd_dev->parent_overlap, rbd_obj_bytes(&rbd_dev->header));
+}
+
 static void rbd_obj_request_get(struct rbd_obj_request *obj_request)
 {
        dout("%s: obj %p (was %d)\n", __func__, obj_request,
@@ -2141,7 +2149,6 @@ static void rbd_img_obj_callback(struct rbd_obj_request *obj_request)
        rbd_assert(img_request->obj_request_count > 0);
        rbd_assert(which != BAD_WHICH);
        rbd_assert(which < img_request->obj_request_count);
-       rbd_assert(which >= img_request->next_completion);
 
        spin_lock_irq(&img_request->completion_lock);
        if (which != img_request->next_completion)
@@ -2682,7 +2689,7 @@ static int rbd_img_obj_request_submit(struct rbd_obj_request *obj_request)
         */
        if (!img_request_write_test(img_request) ||
                !img_request_layered_test(img_request) ||
-               rbd_dev->parent_overlap <= obj_request->img_offset ||
+               !obj_request_overlaps_parent(obj_request) ||
                ((known = obj_request_known_test(obj_request)) &&
                        obj_request_exists_test(obj_request))) {
 
@@ -3219,7 +3226,7 @@ static int rbd_obj_read_sync(struct rbd_device *rbd_dev,
        page_count = (u32) calc_pages_for(offset, length);
        pages = ceph_alloc_page_vector(page_count, GFP_KERNEL);
        if (IS_ERR(pages))
-               ret = PTR_ERR(pages);
+               return PTR_ERR(pages);
 
        ret = -ENOMEM;
        obj_request = rbd_obj_request_create(object_name, offset, length,