Input: serio - define serio_pause_rx guard to pause and resume serio ports

JIRA: https://issues.redhat.com/browse/RHEL-81215
CVE: CVE-2025-21746

commit 0e45a09
Author: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date:   Wed Sep 4 21:17:06 2024 -0700

    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);
            }

    Link: https://lore.kernel.org/r/20240905041732.2034348-2-dmitry.torokhov@gmail.com
    Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Signed-off-by: CKI Backport Bot <cki-ci-bot+cki-gitlab-backport-bot@redhat.com>

Author: CKI Backport Bot

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