[PATCH 2/4] serial: sh-sci: describe locking requirements for invalidating RXDMA

[Wolfram Sang]

Make sure everyone knows that calling this function needs protection.

Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
---
 drivers/tty/serial/sh-sci.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index a6f3517dce74..09eb0c824b10 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1258,6 +1258,7 @@ static int sci_dma_rx_find_active(struct sci_port *s)
 	return -1;
 }
 
+/* Must only be called with uart_port_lock taken */
 static void sci_dma_rx_chan_invalidate(struct sci_port *s)
 {
 	unsigned int i;
-- 
2.43.0