From 894c7bfe3ebe1305bf9e68d6f2ce049895609e00 Mon Sep 17 00:00:00 2001
From: visa <visa@openbsd.org>
Date: Mon, 11 Apr 2022 14:30:05 +0000
Subject: [PATCH] gpio: Add missing device_unref() calls

device_lookup() returns a reference that the caller has to release.

OK jca@
---
 sys/dev/gpio/gpio.c | 39 +++++++++++++++++++++++++++++----------
 1 file changed, 29 insertions(+), 10 deletions(-)

diff --git a/sys/dev/gpio/gpio.c b/sys/dev/gpio/gpio.c
index 421f38be60e..51b2d3ace3b 100644
--- a/sys/dev/gpio/gpio.c
+++ b/sys/dev/gpio/gpio.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: gpio.c,v 1.16 2022/04/06 18:59:28 naddy Exp $	*/
+/*	$OpenBSD: gpio.c,v 1.17 2022/04/11 14:30:05 visa Exp $	*/
 
 /*
  * Copyright (c) 2008 Marc Balmer <mbalmer@openbsd.org>
@@ -53,6 +53,7 @@ int	gpio_detach(struct device *, int);
 int	gpio_search(struct device *, void *, void *);
 int	gpio_print(void *, const char *);
 int	gpio_pinbyname(struct gpio_softc *, char *gp_name);
+int	gpio_ioctl(struct gpio_softc *, u_long, caddr_t, int);
 
 const struct cfattach gpio_ca = {
 	sizeof (struct gpio_softc),
@@ -249,16 +250,20 @@ int
 gpioopen(dev_t dev, int flag, int mode, struct proc *p)
 {
 	struct gpio_softc *sc;
+	int error = 0;
 
 	sc = (struct gpio_softc *)device_lookup(&gpio_cd, minor(dev));
 	if (sc == NULL)
 		return (ENXIO);
 
 	if (sc->sc_opened)
-		return (EBUSY);
-	sc->sc_opened = 1;
+		error = EBUSY;
+	else
+		sc->sc_opened = 1;
 
-	return (0);
+	device_unref(&sc->sc_dev);
+
+	return (error);
 }
 
 int
@@ -272,6 +277,8 @@ gpioclose(dev_t dev, int flag, int mode, struct proc *p)
 
 	sc->sc_opened = 0;
 
+	device_unref(&sc->sc_dev);
+
 	return (0);
 }
 
@@ -287,9 +294,8 @@ gpio_pinbyname(struct gpio_softc *sc, char *gp_name)
 }
 
 int
-gpioioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
+gpio_ioctl(struct gpio_softc *sc, u_long cmd, caddr_t data, int flag)
 {
-	struct gpio_softc *sc;
 	gpio_chipset_tag_t gc;
 	struct gpio_info *info;
 	struct gpio_pin_op *op;
@@ -301,10 +307,6 @@ gpioioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
 	struct device *dv;
 	int pin, value, flags, npins, found;
 
-	sc = (struct gpio_softc *)device_lookup(&gpio_cd, minor(dev));
-	if (sc == NULL)
-		return (ENXIO);
-
 	gc = sc->sc_gc;
 
 	switch (cmd) {
@@ -521,3 +523,20 @@ gpioioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
 
 	return (0);
 }
+
+int
+gpioioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
+{
+	struct gpio_softc *sc;
+	int error;
+
+	sc = (struct gpio_softc *)device_lookup(&gpio_cd, minor(dev));
+	if (sc == NULL)
+		return (ENXIO);
+
+	error = gpio_ioctl(sc, cmd, data, flag);
+
+	device_unref(&sc->sc_dev);
+
+	return (error);
+}
-- 
2.20.1