[PATCH AUTOSEL 5.7 070/388] gpio: dwapb: Call acpi_gpiochip_free_interrupts() on GPIO chip de-registration

[Sasha Levin]

From: Andy Shevchenko <andriy.shevche...@linux.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.shevche...@linux.intel.com>
Tested-by: Serge Semin <fancer.lan...@gmail.com>
Acked-by: Serge Semin <fancer.lan...@gmail.com>
Link: 
https://lore.kernel.org/r/20200519131233.59032-1-andriy.shevche...@linux.intel.com
Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
Signed-off-by: Sasha Levin <sas...@kernel.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 92e127e74813..02cf4c43a4c4 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -533,26 +533,33 @@ 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