Bluetooth: Mesh: Avoid divizion by zero when chunk_size is zero

Avoid divizion by zero when chunk_size is zero.

Coverity-CID: 316406, GitHub issue #58531

Signed-off-by: Pavel Vasilyev <[email protected]>

Author: PavelVPV

subsys/bluetooth/mesh/blob_srv.c

@@ -621,9 +621,9 @@ static int handle_block_start(struct bt_mesh_model *mod, struct bt_mesh_msg_ctx
 	if (!chunk_size || chunk_size > max_chunk_size(srv) ||
 	    (DIV_ROUND_UP((1 << srv->state.xfer.block_size_log), chunk_size) >
 	     max_chunk_count(srv))) {
-		LOG_WRN("Invalid chunk size: (chunk size: %u, max: %u, ceil: %u, count: %u)",
+		LOG_WRN("Invalid chunk size: (chunk size: %u, max: %u, block log: %u, count: %u)",
 			chunk_size, max_chunk_size(srv),
-			DIV_ROUND_UP((1 << srv->state.xfer.block_size_log), chunk_size),
+			srv->state.xfer.block_size_log,
 			max_chunk_count(srv));
 		status = BT_MESH_BLOB_ERR_INVALID_CHUNK_SIZE;
 		goto rsp;