[PATCH 6.1.y-cip 70/85] serial: sh-sci: describe locking requirements for invalidating RXDMA

Tommaso Merciai
2025-03-13T01:33:26Z

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 8efc440549087de41abadf62f4bde1d827135338 upstream.

Make sure everyone knows that calling this function needs protection.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20240506114016.30498-8-wsa+renesas@sang-engineering.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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 69f8ac561513..7c93c9a1079b 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1264,6 +1264,7 @@ 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