linux-kernel - [PATCH 01/24] Input: serio - define serio_pause

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Message-ID: <20240905041732.2034348-2-dmitry.torokhov@gmail.com>
Date: Wed,  4 Sep 2024 21:17:06 -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 01/24] Input: serio - define serio_pause_rx guard to pause and resume serio ports

serio_pause_rx() and serio_continue_rx() are usually used together to
temporarily stop receiving interrupts/data for a given serio port.
Define "serio_pause_rx" guard for this so that the port is always
resumed once critical section is over.

Example:

	scoped_guard(serio_pause_rx, elo->serio) {
		elo->expected_packet = toupper(packet[0]);
		init_completion(&elo->cmd_done);
	}

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 include/linux/serio.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/serio.h b/include/linux/serio.h
index 1911827bbe0d..f4ca0aa37553 100644
--- a/include/linux/serio.h
+++ b/include/linux/serio.h
@@ -6,6 +6,7 @@
 #define _SERIO_H
 
 
+#include <linux/cleanup.h>
 #include <linux/types.h>
 #include <linux/interrupt.h>
 #include <linux/list.h>
@@ -161,4 +162,6 @@ static inline void serio_continue_rx(struct serio *serio)
 	spin_unlock_irq(&serio->lock);
 }
 
+DEFINE_GUARD(serio_pause_rx, struct serio *, serio_pause_rx(_T), serio_continue_rx(_T))
+
 #endif
-- 
2.46.0.469.g59c65b2a67-goog