114  * Return true, if we can't increase the depth further by scaling
118 	unsigned int depth;  in rq_depth_calc_max_depth()  local
123 	 * to have one request ready when one completes, so force a depth of  in rq_depth_calc_max_depth()
124 	 * 2 for those devices. On the backend, it'll be a depth of 1 anyway,  in rq_depth_calc_max_depth()
140 		 * writes, and we allow a temporarily higher depth to  in rq_depth_calc_max_depth()
143 		depth = min_t(unsigned int, rqd->default_depth,  in rq_depth_calc_max_depth()
146 			depth = 1 + ((depth - 1) >> min(31, rqd->scale_step));  in rq_depth_calc_max_depth()
150 			depth = 1 + ((depth - 1) << -rqd->scale_step);  in rq_depth_calc_max_depth()
151 			if (depth > maxd) {  in rq_depth_calc_max_depth()
152 				depth = maxd;  in rq_depth_calc_max_depth()
157 		rqd->max_depth = depth;  in rq_depth_calc_max_depth()