linux-kernel - [PATCH] serial: max310x: change confusing comment about Tx FIFO

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Message-Id: <20231122175957.3875102-1-hugo@hugovil.com>
Date:   Wed, 22 Nov 2023 12:59:56 -0500
From:   Hugo Villeneuve <hugo@...ovil.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>
Cc:     hugo@...ovil.com, Hugo Villeneuve <hvilleneuve@...onoff.com>,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Subject: [PATCH] serial: max310x: change confusing comment about Tx FIFO

From: Hugo Villeneuve <hvilleneuve@...onoff.com>

The comment wording can be confusing, as txlen will return the number of
bytes available in the FIFO, which can be less than the maximum theoretical
Tx FIFO size.

Change the comment so that it is unambiguous.

Signed-off-by: Hugo Villeneuve <hvilleneuve@...onoff.com>
---
 drivers/tty/serial/max310x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
index 97e4965b73d4..f3a99daebdaa 100644
--- a/drivers/tty/serial/max310x.c
+++ b/drivers/tty/serial/max310x.c
@@ -780,7 +780,7 @@ static void max310x_handle_tx(struct uart_port *port)
 	to_send = uart_circ_chars_pending(xmit);
 	until_end = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
 	if (likely(to_send)) {
-		/* Limit to size of TX FIFO */
+		/* Limit to space available in TX FIFO */
 		txlen = max310x_port_read(port, MAX310X_TXFIFOLVL_REG);
 		txlen = port->fifosize - txlen;
 		to_send = (to_send > txlen) ? txlen : to_send;

base-commit: 98b1cc82c4affc16f5598d4fa14b1858671b2263
-- 
2.39.2