linux-kernel - [PATCH v2] Input: sparcspkr - use cleanup facility for device

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Message-Id: <20241020-input_automate_of_node_put-v2-1-ddec58b4b99e@gmail.com>
Date: Sun, 20 Oct 2024 20:27:13 +0200
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Hans de Goede <hdegoede@...hat.com>, Chen-Yu Tsai <wens@...e.org>, 
 Jernej Skrabec <jernej.skrabec@...il.com>, 
 Samuel Holland <samuel@...lland.org>, 
 Florian Fainelli <florian.fainelli@...adcom.com>, 
 Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
 linux-sunxi@...ts.linux.dev, linux-rpi-kernel@...ts.infradead.org, 
 Javier Carrasco <javier.carrasco.cruz@...il.com>
Subject: [PATCH v2] Input: sparcspkr - use cleanup facility for device_node

Use the 'free(device_node)' macro to simplify the code by automatically
freeing the device node, which removes the need for explicit calls to
'of_node_put()'.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
---
Changes in v2:
- rebase onto input/next, drop applied patches.
- sparcspkr: drop goto before node declaration and return -ENOMEM.
- Link to v1: https://lore.kernel.org/r/20241010-input_automate_of_node_put-v1-0-ebc62138fbf8@gmail.com
---
 drivers/input/misc/sparcspkr.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/input/misc/sparcspkr.c b/drivers/input/misc/sparcspkr.c
index ff7b6291894a..66ddea9a203a 100644
--- a/drivers/input/misc/sparcspkr.c
+++ b/drivers/input/misc/sparcspkr.c
@@ -182,25 +182,23 @@ static int bbc_beep_probe(struct platform_device *op)
 {
 	struct sparcspkr_state *state;
 	struct bbc_beep_info *info;
-	struct device_node *dp;
-	int err = -ENOMEM;
+	int err;
 
 	state = kzalloc(sizeof(*state), GFP_KERNEL);
 	if (!state)
-		goto out_err;
+		return -ENOMEM;
 
 	state->name = "Sparc BBC Speaker";
 	state->event = bbc_spkr_event;
 	spin_lock_init(&state->lock);
 
-	dp = of_find_node_by_path("/");
 	err = -ENODEV;
+	struct device_node *dp __free(device_node) = of_find_node_by_path("/");
 	if (!dp)
 		goto out_free;
 
 	info = &state->u.bbc;
 	info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0);
-	of_node_put(dp);
 	if (!info->clock_freq)
 		goto out_free;
 
@@ -221,7 +219,6 @@ static int bbc_beep_probe(struct platform_device *op)
 
 out_free:
 	kfree(state);
-out_err:
 	return err;
 }
 

---
base-commit: 00850d7b542aa4a8240cf977d43dc6d2158e48d7
change-id: 20241009-input_automate_of_node_put-1bae9f5c02d9

Best regards,
-- 
Javier Carrasco <javier.carrasco.cruz@...il.com>