linux-kernel - [PATCH 09/24] Input: elo - use guard notation when pausing serio port

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Message-ID: <20240905041732.2034348-10-dmitry.torokhov@gmail.com>
Date: Wed,  4 Sep 2024 21:17:14 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: linux-input@...r.kernel.org
Cc: Pali Rohár <pali@...nel.org>,
	Helge Deller <deller@....de>,
	"K. Y. Srinivasan" <kys@...rosoft.com>,
	Wei Liu <wei.liu@...nel.org>,
	Dexuan Cui <decui@...rosoft.com>,
	Samuel Holland <samuel@...lland.org>,
	Lyude Paul <thatslyude@...il.com>,
	Michal Simek <michal.simek@....com>,
	Hans de Goede <hdegoede@...hat.com>,
	linux-kernel@...r.kernel.org,
	linux-hyperv@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev
Subject: [PATCH 09/24] Input: elo - use guard notation when pausing serio port

Using guard notation makes the code more compact and error handling
more robust by ensuring that serio ports are resumed in all code paths
when control leaves critical section.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/input/touchscreen/elo.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/input/touchscreen/elo.c b/drivers/input/touchscreen/elo.c
index eb883db55420..ad209e6e82a6 100644
--- a/drivers/input/touchscreen/elo.c
+++ b/drivers/input/touchscreen/elo.c
@@ -225,10 +225,10 @@ static int elo_command_10(struct elo *elo, unsigned char *packet)
 
 	mutex_lock(&elo->cmd_mutex);
 
-	serio_pause_rx(elo->serio);
-	elo->expected_packet = toupper(packet[0]);
-	init_completion(&elo->cmd_done);
-	serio_continue_rx(elo->serio);
+	scoped_guard(serio_pause_rx, elo->serio) {
+		elo->expected_packet = toupper(packet[0]);
+		init_completion(&elo->cmd_done);
+	}
 
 	if (serio_write(elo->serio, ELO10_LEAD_BYTE))
 		goto out;
-- 
2.46.0.469.g59c65b2a67-goog