linux-kernel - [PATCH v4 2/5] serial: sc16is7xx: unconditionally clear line bit in sc16is7xx

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Message-Id: <20240409154253.3043822-3-hugo@hugovil.com>
Date: Tue,  9 Apr 2024 11:42:50 -0400
From: Hugo Villeneuve <hugo@...ovil.com>
To: gregkh@...uxfoundation.org,
	jirislaby@...nel.org,
	peterz@...radead.org,
	mingo@...nel.org
Cc: linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org,
	hugo@...ovil.com,
	andy.shevchenko@...il.com,
	Hugo Villeneuve <hvilleneuve@...onoff.com>,
	Andy Shevchenko <andy@...nel.org>
Subject: [PATCH v4 2/5] serial: sc16is7xx: unconditionally clear line bit in sc16is7xx_remove()

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

There is no need to check for previous port registration in
sc16is7xx_remove() because if sc16is7xx_probe() succeeded, we are
guaranteed to have successfully registered both ports. We can thus
unconditionally clear the line allocation bit in sc16is7xx_lines.

Signed-off-by: Hugo Villeneuve <hvilleneuve@...onoff.com>
Reviewed-by: Andy Shevchenko <andy@...nel.org>
---
 drivers/tty/serial/sc16is7xx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 34edc80859d5c..b971fd2a9a77e 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -1670,8 +1670,8 @@ static void sc16is7xx_remove(struct device *dev)
 
 	for (i = 0; i < s->devtype->nr_uart; i++) {
 		kthread_cancel_delayed_work_sync(&s->p[i].ms_work);
-		if (test_and_clear_bit(s->p[i].port.line, sc16is7xx_lines))
-			uart_remove_one_port(&sc16is7xx_uart, &s->p[i].port);
+		clear_bit(s->p[i].port.line, sc16is7xx_lines);
+		uart_remove_one_port(&sc16is7xx_uart, &s->p[i].port);
 		sc16is7xx_power(&s->p[i].port, 0);
 	}
 
-- 
2.39.2