1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/hid/intel-ish-hid/ishtp/client-buffers.c b/drivers/hid/intel-ish-hid/ishtp/client-buffers.c
index b9b917d2d50d..12d61305e83d 100644
--- a/drivers/hid/intel-ish-hid/ishtp/client-buffers.c
+++ b/drivers/hid/intel-ish-hid/ishtp/client-buffers.c
@@ -255,3 +255,48 @@ int ishtp_cl_io_rb_recycle(struct ishtp_cl_rb *rb)
 	return	rets;
 }
 EXPORT_SYMBOL(ishtp_cl_io_rb_recycle);
+
+/**
+ * ishtp_cl_tx_empty() -test whether client device tx buffer is empty
+ * @cl: Pointer to client device instance
+ *
+ * Look client device tx buffer list, and check whether this list is empty
+ *
+ * Return: true if client tx buffer list is empty else false
+ */
+bool ishtp_cl_tx_empty(struct ishtp_cl *cl)
+{
+	int tx_list_empty;
+	unsigned long tx_flags;
+
+	spin_lock_irqsave(&cl->tx_list_spinlock, tx_flags);
+	tx_list_empty = list_empty(&cl->tx_list.list);
+	spin_unlock_irqrestore(&cl->tx_list_spinlock, tx_flags);
+
+	return !!tx_list_empty;
+}
+EXPORT_SYMBOL(ishtp_cl_tx_empty);
+
+/**
+ * ishtp_cl_rx_get_rb() -Get a rb from client device rx buffer list
+ * @cl: Pointer to client device instance
+ *
+ * Check client device in-processing buffer list and get a rb from it.
+ *
+ * Return: rb pointer if buffer list isn't empty else NULL
+ */
+struct ishtp_cl_rb *ishtp_cl_rx_get_rb(struct ishtp_cl *cl)
+{
+	unsigned long rx_flags;
+	struct ishtp_cl_rb *rb;
+
+	spin_lock_irqsave(&cl->in_process_spinlock, rx_flags);
+	rb = list_first_entry_or_null(&cl->in_process_list.list,
+				struct ishtp_cl_rb, list);
+	if (rb)
+		list_del_init(&rb->list);
+	spin_unlock_irqrestore(&cl->in_process_spinlock, rx_flags);
+
+	return rb;
+}
+EXPORT_SYMBOL(ishtp_cl_rx_get_rb);