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

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Message-ID: <20240506114016.30498-8-wsa+renesas@sang-engineering.com>
Date: Mon,  6 May 2024 13:40:18 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: linux-renesas-soc@...r.kernel.org
Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org
Subject: [PATCH 2/4] serial: sh-sci: describe locking requirements for invalidating RXDMA

Make sure everyone knows that calling this function needs protection.

Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---
 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