void gb_connection_recv()

in operation.c [1026:1065]

• 35 lines of code
• 6 McCabe index (conditional complexity)

void gb_connection_recv(struct gb_connection *connection,
			void *data, size_t size)
{
	struct gb_operation_msg_hdr header;
	struct device *dev = &connection->hd->dev;
	size_t msg_size;

	if (connection->state == GB_CONNECTION_STATE_DISABLED ||
	    gb_connection_is_offloaded(connection)) {
		dev_warn_ratelimited(dev, "%s: dropping %zu received bytes\n",
				     connection->name, size);
		return;
	}

	if (size < sizeof(header)) {
		dev_err_ratelimited(dev, "%s: short message received\n",
				    connection->name);
		return;
	}

	/* Use memcpy as data may be unaligned */
	memcpy(&header, data, sizeof(header));
	msg_size = le16_to_cpu(header.size);
	if (size < msg_size) {
		dev_err_ratelimited(dev,
				    "%s: incomplete message 0x%04x of type 0x%02x received (%zu < %zu)\n",
				    connection->name,
				    le16_to_cpu(header.operation_id),
				    header.type, size, msg_size);
		return;		/* XXX Should still complete operation */
	}

	if (header.type & GB_MESSAGE_TYPE_RESPONSE) {
		gb_connection_recv_response(connection,	&header, data,
					    msg_size);
	} else {
		gb_connection_recv_request(connection, &header, data,
					   msg_size);
	}
}