[PATCH 1/3] gpio: sim: lock device when calling device_is_bound()

[Bartosz Golaszewski]

The kerneldoc for device_is_bound() says it must be called with the
device lock taken. Add missing synchronization to this driver.

Fixes: 7fb3287946f9 ("gpio: sim: stop using dev-sync-probe")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>
---
 drivers/gpio/gpio-sim.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c
index e19701c2ed673f8ec5a2475e632388197a78339c..0da2c5a45843ea22ef39273c2e39dc128664f0b2 100644
--- a/drivers/gpio/gpio-sim.c
+++ b/drivers/gpio/gpio-sim.c
@@ -901,7 +901,7 @@ static int gpio_sim_device_activate(struct gpio_sim_device *dev)
 	struct platform_device *pdev;
 	struct fwnode_handle *swnode;
 	struct gpio_sim_bank *bank;
-	int ret;
+	int ret = 0;
 
 	lockdep_assert_held(&dev->lock);
 
@@ -945,9 +945,12 @@ static int gpio_sim_device_activate(struct gpio_sim_device *dev)
 	}
 
 	wait_for_device_probe();
-	if (!device_is_bound(&pdev->dev)) {
-		ret = -ENXIO;
-		goto err_unregister_pdev;
+
+	scoped_guard(device, &pdev->dev) {
+		if (!device_is_bound(&pdev->dev)) {
+			ret = -ENXIO;
+			goto err_unregister_pdev;
+		}
 	}
 
 	dev->pdev = pdev;

-- 
2.47.3