wifi: wlcore: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code.  However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

wlcore_remove() returned zero unconditionally. With that converted to
return void instead, the wl12xx and wl18xx driver can be converted to
.remove_new trivially.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230912171249.755901-1-u.kleine-koenig@pengutronix.de

4 files changed, 7 insertions, 9 deletions

diff --git a/drivers/net/wireless/ti/wl12xx/main.c b/drivers/net/wireless/ti/wl12xx/main.c
index d06a2c419447..de045fe4ca1e 100644
--- a/drivers/net/wireless/ti/wl12xx/main.c
+++ b/drivers/net/wireless/ti/wl12xx/main.c
@@ -1919,7 +1919,7 @@ out:
 	return ret;
 }
 
-static int wl12xx_remove(struct platform_device *pdev)
+static void wl12xx_remove(struct platform_device *pdev)
 {
 	struct wl1271 *wl = platform_get_drvdata(pdev);
 	struct wl12xx_priv *priv;
@@ -1928,7 +1928,7 @@ static int wl12xx_remove(struct platform_device *pdev)
 
 	kfree(priv->rx_mem_addr);
 
-	return wlcore_remove(pdev);
+	wlcore_remove(pdev);
 }
 
 static const struct platform_device_id wl12xx_id_table[] = {
@@ -1939,7 +1939,7 @@ MODULE_DEVICE_TABLE(platform, wl12xx_id_table);
 
 static struct platform_driver wl12xx_driver = {
 	.probe		= wl12xx_probe,
-	.remove		= wl12xx_remove,
+	.remove_new	= wl12xx_remove,
 	.id_table	= wl12xx_id_table,
 	.driver = {
 		.name	= "wl12xx_driver",
diff --git a/drivers/net/wireless/ti/wl18xx/main.c b/drivers/net/wireless/ti/wl18xx/main.c
index 0b3cf8477c6c..d4a89401f2c4 100644
--- a/drivers/net/wireless/ti/wl18xx/main.c
+++ b/drivers/net/wireless/ti/wl18xx/main.c
@@ -2033,7 +2033,7 @@ MODULE_DEVICE_TABLE(platform, wl18xx_id_table);
 
 static struct platform_driver wl18xx_driver = {
 	.probe		= wl18xx_probe,
-	.remove		= wlcore_remove,
+	.remove_new	= wlcore_remove,
 	.id_table	= wl18xx_id_table,
 	.driver = {
 		.name	= "wl18xx_driver",
diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c
index b7e68d2721c1..448c478a0fdd 100644
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -6737,7 +6737,7 @@ int wlcore_probe(struct wl1271 *wl, struct platform_device *pdev)
 }
 EXPORT_SYMBOL_GPL(wlcore_probe);
 
-int wlcore_remove(struct platform_device *pdev)
+void wlcore_remove(struct platform_device *pdev)
 {
 	struct wlcore_platdev_data *pdev_data = dev_get_platdata(&pdev->dev);
 	struct wl1271 *wl = platform_get_drvdata(pdev);
@@ -6752,7 +6752,7 @@ int wlcore_remove(struct platform_device *pdev)
 	if (pdev_data->family && pdev_data->family->nvs_name)
 		wait_for_completion(&wl->nvs_loading_complete);
 	if (!wl->initialized)
-		return 0;
+		return;
 
 	if (wl->wakeirq >= 0) {
 		dev_pm_clear_wake_irq(wl->dev);
@@ -6772,8 +6772,6 @@ int wlcore_remove(struct platform_device *pdev)
 
 	free_irq(wl->irq, wl);
 	wlcore_free_hw(wl);
-
-	return 0;
 }
 EXPORT_SYMBOL_GPL(wlcore_remove);
 
diff --git a/drivers/net/wireless/ti/wlcore/wlcore.h b/drivers/net/wireless/ti/wlcore/wlcore.h
index 81c94d390623..1f8511bf9bb3 100644
--- a/drivers/net/wireless/ti/wlcore/wlcore.h
+++ b/drivers/net/wireless/ti/wlcore/wlcore.h
@@ -497,7 +497,7 @@ struct wl1271 {
 };
 
 int wlcore_probe(struct wl1271 *wl, struct platform_device *pdev);
-int wlcore_remove(struct platform_device *pdev);
+void wlcore_remove(struct platform_device *pdev);
 struct ieee80211_hw *wlcore_alloc_hw(size_t priv_size, u32 aggr_buf_size,
 				     u32 mbox_size);
 int wlcore_free_hw(struct wl1271 *wl);