ave, &channel->vc.lock) {
+		if (list_empty(&channel->ld_free))
+			return NULL;
 
-	desc = list_first_entry(&channel->ld_free, struct rz_dmac_desc, node);
+		desc = list_first_entry(&channel->ld_free, struct rz_dmac_desc, node);
 
-	for_each_sg(sgl, sg, sg_len, i) {
-		dma_length += sg_dma_len(sg);
-	}
+		for_each_sg(sgl, sg, sg_len, i)
+			dma_length += sg_dma_len(sg);
 
-	desc->type = RZ_DMAC_DESC_SLAVE_SG;
-	desc->sg = sgl;
-	desc->sgcount = sg_len;
-	desc->len = dma_length;
-	desc->direction = direction;
+		desc->type = RZ_DMAC_DESC_SLAVE_SG;
+		desc->sg = sgl;
+		desc->sgcount = sg_len;
+		desc->len = dma_length;
+		desc->direction = direction;
 
-	if (direction == DMA_DEV_TO_MEM)
-		desc->src = channel->src_per_address;
-	else
-		desc->dest = channel->dst_per_address;
+		if (direction == DMA_DEV_TO_MEM)
+			desc->src = channel->src_per_address;
+		else
+			desc->dest = channel->dst_per_address;
+
+		list_move_tail(channel->ld_free.next, &channel->ld_queue);
+	}
 
-	list_move_tail(channel->ld_free.next, &channel->ld_queue);
 	return vchan_tx_prep(&channel->vc, &desc->vd, flags);
 }
 
-- 
2.43.0[PATCH v6 1/8] dmaengine: sh: rz-dmac: Protect the driver specific listsClaudiu <claudiu.beznea@tuxon.dev> undefinedvkoul@kernel.org, biju.das.jz@bp.renesas.com, fabrizio.castro.jz@renesas.com, geert+renesas@glider.be, prabhakar.mahadev-lad.rj@bp.renesas.com undefined undefined undefined undefined undefined undefined undefined undefined undefinedÔB„Ù