linux-kernel - [PATCH 4.19 028/206] gpio: dwapb: Call acpi_gpiochip_free_interrupts() on GPIO chip de-registration

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Message-Id: <20200623195318.363769191@linuxfoundation.org>
Date:   Tue, 23 Jun 2020 21:55:56 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 028/206] gpio: dwapb: Call acpi_gpiochip_free_interrupts() on GPIO chip de-registration

From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

[ Upstream commit 494a94e38dcf62543a32a4424d646ff80b4b28bd ]

Add missed acpi_gpiochip_free_interrupts() call when unregistering ports.

While at it, drop extra check to call acpi_gpiochip_request_interrupts().
There is no need to have an additional check to call
acpi_gpiochip_request_interrupts(). Even without any interrupts available
the registered ACPI Event handlers can be useful for debugging purposes.

Fixes: e6cb3486f5a1 ("gpio: dwapb: add gpio-signaled acpi event support")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Tested-by: Serge Semin <fancer.lancer@...il.com>
Acked-by: Serge Semin <fancer.lancer@...il.com>
Link: https://lore.kernel.org/r/20200519131233.59032-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpio/gpio-dwapb.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index 044888fd96a1f..68db0033d1586 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -535,26 +535,33 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
 		dwapb_configure_irqs(gpio, port, pp);
 
 	err = gpiochip_add_data(&port->gc, port);
-	if (err)
+	if (err) {
 		dev_err(gpio->dev, "failed to register gpiochip for port%d\n",
 			port->idx);
-	else
-		port->is_registered = true;
+		return err;
+	}
 
 	/* Add GPIO-signaled ACPI event support */
-	if (pp->has_irq)
-		acpi_gpiochip_request_interrupts(&port->gc);
+	acpi_gpiochip_request_interrupts(&port->gc);
 
-	return err;
+	port->is_registered = true;
+
+	return 0;
 }
 
 static void dwapb_gpio_unregister(struct dwapb_gpio *gpio)
 {
 	unsigned int m;
 
-	for (m = 0; m < gpio->nr_ports; ++m)
-		if (gpio->ports[m].is_registered)
-			gpiochip_remove(&gpio->ports[m].gc);
+	for (m = 0; m < gpio->nr_ports; ++m) {
+		struct dwapb_gpio_port *port = &gpio->ports[m];
+
+		if (!port->is_registered)
+			continue;
+
+		acpi_gpiochip_free_interrupts(&port->gc);
+		gpiochip_remove(&port->gc);
+	}
 }
 
 static struct dwapb_platform_data *
-- 
2.25.1