[PATCH 21/26] Input: maplemouse - convert to devm

[Dmitry Torokhov]

Convert the driver to use managed resources to simplify resource
lifecycle management.

This eliminates manual error handling in probe() and allows removing
the remove() callback entirely, as all cleanup is handled automatically.

Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
 drivers/input/mouse/maplemouse.c | 37 +++++++++----------------------------
 1 file changed, 9 insertions(+), 28 deletions(-)

diff --git a/drivers/input/mouse/maplemouse.c b/drivers/input/mouse/maplemouse.c
index 03cb666d278d..7842bd46c9a1 100644
--- a/drivers/input/mouse/maplemouse.c
+++ b/drivers/input/mouse/maplemouse.c
@@ -70,17 +70,13 @@ static int probe_maple_mouse(struct maple_device *mdev)
 	struct input_dev *input_dev;
 	struct dc_mouse *mse;
 
-	mse = kzalloc_obj(*mse);
-	if (!mse) {
-		error = -ENOMEM;
-		goto fail;
-	}
-
-	input_dev = input_allocate_device();
-	if (!input_dev) {
-		error = -ENOMEM;
-		goto fail_nomem;
-	}
+	mse = devm_kzalloc(&mdev->dev, sizeof(*mse), GFP_KERNEL);
+	if (!mse)
+		return -ENOMEM;
+
+	input_dev = devm_input_allocate_device(&mdev->dev);
+	if (!input_dev)
+		return -ENOMEM;
 
 	mse->dev = input_dev;
 	mse->mdev = mdev;
@@ -99,29 +95,14 @@ static int probe_maple_mouse(struct maple_device *mdev)
 	input_dev->id.bustype = BUS_HOST;
 	error =	input_register_device(input_dev);
 	if (error)
-		goto fail_register;
-	return error;
-
-fail_register:
-	input_free_device(input_dev);
-fail_nomem:
-	kfree(mse);
-fail:
-	return error;
-}
+		return error;
 
-static void remove_maple_mouse(struct maple_device *mdev)
-{
-	struct dc_mouse *mse = maple_get_drvdata(mdev);
-
-	input_unregister_device(mse->dev);
-	kfree(mse);
+	return 0;
 }
 
 static struct maple_driver dc_mouse_driver = {
 	.function =	MAPLE_FUNC_MOUSE,
 	.probe =	probe_maple_mouse,
-	.remove =	remove_maple_mouse,
 	.drv = {
 		.name = "Dreamcast_mouse",
 	},

-- 
2.55.0.rc0.799.gd6f94ed593-goog