linux-kernel - [PATCH 15/22] Input: iqs7222 - use cleanup facility for fwnodes

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Message-ID: <20240904044825.1048256-1-dmitry.torokhov@gmail.com>
Date: Tue,  3 Sep 2024 21:48:25 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: linux-input@...r.kernel.org
Cc: Michael Hennerich <michael.hennerich@...log.com>,
	Ville Syrjala <syrjala@....fi>,
	Support Opensource <support.opensource@...semi.com>,
	Eddie James <eajames@...ux.ibm.com>,
	Andrey Moiseev <o2g.org.ru@...il.com>,
	Hans de Goede <hdegoede@...hat.com>,
	Javier Carrasco <javier.carrasco.cruz@...il.com>,
	Jeff LaBundy <jeff@...undy.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 15/22] Input: iqs7222 - use cleanup facility for fwnodes

Use __free(fwnode_handle) cleanup facility to ensure that references to
acquired fwnodes are dropped at appropriate times automatically.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/input/misc/iqs7222.c | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/drivers/input/misc/iqs7222.c b/drivers/input/misc/iqs7222.c
index 9ca5a743f19f..d9b87606ff7a 100644
--- a/drivers/input/misc/iqs7222.c
+++ b/drivers/input/misc/iqs7222.c
@@ -2385,9 +2385,9 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222,
 	for (i = 0; i < ARRAY_SIZE(iqs7222_kp_events); i++) {
 		const char *event_name = iqs7222_kp_events[i].name;
 		u16 event_enable = iqs7222_kp_events[i].enable;
-		struct fwnode_handle *event_node;
 
-		event_node = fwnode_get_named_child_node(chan_node, event_name);
+		struct fwnode_handle *event_node __free(fwnode_handle) =
+			fwnode_get_named_child_node(chan_node, event_name);
 		if (!event_node)
 			continue;
 
@@ -2408,7 +2408,6 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222,
 				dev_err(&client->dev,
 					"Invalid %s press timeout: %u\n",
 					fwnode_get_name(event_node), val);
-				fwnode_handle_put(event_node);
 				return -EINVAL;
 			}
 
@@ -2418,7 +2417,6 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222,
 			dev_err(&client->dev,
 				"Failed to read %s press timeout: %d\n",
 				fwnode_get_name(event_node), error);
-			fwnode_handle_put(event_node);
 			return error;
 		}
 
@@ -2429,7 +2427,6 @@ static int iqs7222_parse_chan(struct iqs7222_private *iqs7222,
 					    dev_desc->touch_link - (i ? 0 : 2),
 					    &iqs7222->kp_type[chan_index][i],
 					    &iqs7222->kp_code[chan_index][i]);
-		fwnode_handle_put(event_node);
 		if (error)
 			return error;
 
@@ -2604,10 +2601,10 @@ static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222,
 
 	for (i = 0; i < ARRAY_SIZE(iqs7222_sl_events); i++) {
 		const char *event_name = iqs7222_sl_events[i].name;
-		struct fwnode_handle *event_node;
 		enum iqs7222_reg_key_id reg_key;
 
-		event_node = fwnode_get_named_child_node(sldr_node, event_name);
+		struct fwnode_handle *event_node __free(fwnode_handle) =
+			fwnode_get_named_child_node(sldr_node, event_name);
 		if (!event_node)
 			continue;
 
@@ -2639,7 +2636,6 @@ static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222,
 					      : sldr_setup[4 + reg_offset],
 					    NULL,
 					    &iqs7222->sl_code[sldr_index][i]);
-		fwnode_handle_put(event_node);
 		if (error)
 			return error;
 
@@ -2742,9 +2738,9 @@ static int iqs7222_parse_tpad(struct iqs7222_private *iqs7222,
 
 	for (i = 0; i < ARRAY_SIZE(iqs7222_tp_events); i++) {
 		const char *event_name = iqs7222_tp_events[i].name;
-		struct fwnode_handle *event_node;
 
-		event_node = fwnode_get_named_child_node(tpad_node, event_name);
+		struct fwnode_handle *event_node __free(fwnode_handle) =
+			fwnode_get_named_child_node(tpad_node, event_name);
 		if (!event_node)
 			continue;
 
@@ -2760,7 +2756,6 @@ static int iqs7222_parse_tpad(struct iqs7222_private *iqs7222,
 					    iqs7222_tp_events[i].link, 1566,
 					    NULL,
 					    &iqs7222->tp_code[i]);
-		fwnode_handle_put(event_node);
 		if (error)
 			return error;
 
@@ -2818,9 +2813,9 @@ static int iqs7222_parse_reg_grp(struct iqs7222_private *iqs7222,
 				 int reg_grp_index)
 {
 	struct i2c_client *client = iqs7222->client;
-	struct fwnode_handle *reg_grp_node;
 	int error;
 
+	struct fwnode_handle *reg_grp_node __free(fwnode_handle) = NULL;
 	if (iqs7222_reg_grp_names[reg_grp]) {
 		char reg_grp_name[16];
 
@@ -2838,14 +2833,17 @@ static int iqs7222_parse_reg_grp(struct iqs7222_private *iqs7222,
 
 	error = iqs7222_parse_props(iqs7222, reg_grp_node, reg_grp_index,
 				    reg_grp, IQS7222_REG_KEY_NONE);
+	if (error)
+		return error;
 
-	if (!error && iqs7222_parse_extra[reg_grp])
+	if (iqs7222_parse_extra[reg_grp]) {
 		error = iqs7222_parse_extra[reg_grp](iqs7222, reg_grp_node,
 						     reg_grp_index);
+		if (error)
+			return error;
+	}
 
-	fwnode_handle_put(reg_grp_node);
-
-	return error;
+	return 0;
 }
 
 static int iqs7222_parse_all(struct iqs7222_private *iqs7222)
-- 
2.46.0.469.g59c65b2a67-goog