linux-kernel - [PATCH 4/8] Input: ff-memless - make use of _

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Message-ID: <20241107071538.195340-5-dmitry.torokhov@gmail.com>
Date: Wed,  6 Nov 2024 23:15:31 -0800
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Jiri Kosina <jikos@...nel.org>,
	Benjamin Tissoires <bentiss@...nel.org>,
	Hans de Goede <hdegoede@...hat.com>
Cc: linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 4/8] Input: ff-memless - make use of __free() cleanup facility

Annotate allocated memory with __free(kfree) to simplify the code and
make sure memory is released appropriately.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/input/ff-memless.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/input/ff-memless.c b/drivers/input/ff-memless.c
index ec99c070a97c..0bbeceb35545 100644
--- a/drivers/input/ff-memless.c
+++ b/drivers/input/ff-memless.c
@@ -503,12 +503,11 @@ static void ml_ff_destroy(struct ff_device *ff)
 int input_ff_create_memless(struct input_dev *dev, void *data,
 		int (*play_effect)(struct input_dev *, void *, struct ff_effect *))
 {
-	struct ml_device *ml;
 	struct ff_device *ff;
 	int error;
 	int i;
 
-	ml = kzalloc(sizeof(struct ml_device), GFP_KERNEL);
+	struct ml_device *ml __free(kfree) = kzalloc(sizeof(*ml), GFP_KERNEL);
 	if (!ml)
 		return -ENOMEM;
 
@@ -521,13 +520,11 @@ int input_ff_create_memless(struct input_dev *dev, void *data,
 	set_bit(FF_GAIN, dev->ffbit);
 
 	error = input_ff_create(dev, FF_MEMLESS_EFFECTS);
-	if (error) {
-		kfree(ml);
+	if (error)
 		return error;
-	}
 
 	ff = dev->ff;
-	ff->private = ml;
+	ff->private = no_free_ptr(ml);
 	ff->upload = ml_ff_upload;
 	ff->playback = ml_ff_playback;
 	ff->set_gain = ml_ff_set_gain;
-- 
2.47.0.277.g8800431eea-goog