HID: intel-ish-hid: Add ishtp_get_connection_state() interface

Add the ishtp_get_connection_state() function for struct ishtp_cl, allowing
ishtp client drivers to retrieve the current connection state.

Signed-off-by: Zhang Lixu <[e-mail]>
Acked-by: Srinivas Pandruvada <[e-mail]>
Signed-off-by: Jiri Kosina <[e-mail]>

drivers/hid/intel-ish-hid/ishtp/client.c

···
 }
 EXPORT_SYMBOL(ishtp_set_connection_state);
 
+int ishtp_get_connection_state(struct ishtp_cl *cl)
+{
+	return cl->state;
+}
+EXPORT_SYMBOL(ishtp_get_connection_state);
+
 void ishtp_cl_set_fw_client_id(struct ishtp_cl *cl, int fw_client_id)
 {
 	cl->fw_client_id = fw_client_id;

include/linux/intel-ish-client-if.h

···
 void ishtp_set_tx_ring_size(struct ishtp_cl *cl, int size);
 void ishtp_set_rx_ring_size(struct ishtp_cl *cl, int size);
 void ishtp_set_connection_state(struct ishtp_cl *cl, int state);
+int ishtp_get_connection_state(struct ishtp_cl *cl);
 void ishtp_cl_set_fw_client_id(struct ishtp_cl *cl, int fw_client_id);
 
 void ishtp_put_device(struct ishtp_cl_device *cl_dev);