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From: "Ricardo B. Marliere" <ricardo@marliere.net>
Date: Sun, 18 Feb 2024 16:18:09 -0300
Subject: [PATCH 1/4] usb: typec: constify the struct device_type usage
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Message-Id: <20240218-device_cleanup-usb-v1-1-77423c4da262@marliere.net>
References: <20240218-device_cleanup-usb-v1-0-77423c4da262@marliere.net>
In-Reply-To: <20240218-device_cleanup-usb-v1-0-77423c4da262@marliere.net>
To: Heikki Krogerus <heikki.krogerus@linux.intel.com>, 
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, 
 "Ricardo B. Marliere" <ricardo@marliere.net>

Since commit aed65af1cc2f ("drivers: make device_type const"), the driver
core can properly handle constant struct device_type. Move all the
device_type variables in use by the driver to be constant structures as
well, placing it into read-only memory which can not be modified at
runtime.

Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
---
 drivers/usb/typec/pd.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/usb/typec/pd.c b/drivers/usb/typec/pd.c
index b9cca2be76fc..d78c04a421bc 100644
--- a/drivers/usb/typec/pd.c
+++ b/drivers/usb/typec/pd.c
@@ -157,7 +157,7 @@ static const struct attribute_group source_fixed_supply_group = {
 };
 __ATTRIBUTE_GROUPS(source_fixed_supply);
 
-static struct device_type source_fixed_supply_type = {
+static const struct device_type source_fixed_supply_type = {
 	.name = "pdo",
 	.release = pdo_release,
 	.groups = source_fixed_supply_groups,
@@ -182,7 +182,7 @@ static const struct attribute_group sink_fixed_supply_group = {
 };
 __ATTRIBUTE_GROUPS(sink_fixed_supply);
 
-static struct device_type sink_fixed_supply_type = {
+static const struct device_type sink_fixed_supply_type = {
 	.name = "pdo",
 	.release = pdo_release,
 	.groups = sink_fixed_supply_groups,
@@ -213,7 +213,7 @@ static struct attribute *source_variable_supply_attrs[] = {
 };
 ATTRIBUTE_GROUPS(source_variable_supply);
 
-static struct device_type source_variable_supply_type = {
+static const struct device_type source_variable_supply_type = {
 	.name = "pdo",
 	.release = pdo_release,
 	.groups = source_variable_supply_groups,
@@ -227,7 +227,7 @@ static struct attribute *sink_variable_supply_attrs[] = {
 };
 ATTRIBUTE_GROUPS(sink_variable_supply);
 
-static struct device_type sink_variable_supply_type = {
+static const struct device_type sink_variable_supply_type = {
 	.name = "pdo",
 	.release = pdo_release,
 	.groups = sink_variable_supply_groups,
@@ -258,7 +258,7 @@ static struct attribute *source_battery_attrs[] = {
 };
 ATTRIBUTE_GROUPS(source_battery);
 
-static struct device_type source_battery_type = {
+static const struct device_type source_battery_type = {
 	.name = "pdo",
 	.release = pdo_release,
 	.groups = source_battery_groups,
@@ -272,7 +272,7 @@ static struct attribute *sink_battery_attrs[] = {
 };
 ATTRIBUTE_GROUPS(sink_battery);
 
-static struct device_type sink_battery_type = {
+static const struct device_type sink_battery_type = {
 	.name = "pdo",
 	.release = pdo_release,
 	.groups = sink_battery_groups,
@@ -339,7 +339,7 @@ static struct attribute *source_pps_attrs[] = {
 };
 ATTRIBUTE_GROUPS(source_pps);
 
-static struct device_type source_pps_type = {
+static const struct device_type source_pps_type = {
 	.name = "pdo",
 	.release = pdo_release,
 	.groups = source_pps_groups,
@@ -353,7 +353,7 @@ static struct attribute *sink_pps_attrs[] = {
 };
 ATTRIBUTE_GROUPS(sink_pps);
 
-static struct device_type sink_pps_type = {
+static const struct device_type sink_pps_type = {
 	.name = "pdo",
 	.release = pdo_release,
 	.groups = sink_pps_groups,
@@ -371,30 +371,30 @@ static const char * const apdo_supply_name[] = {
 	[APDO_TYPE_PPS]  = "programmable_supply",
 };
 
-static struct device_type *source_type[] = {
+static const struct device_type *source_type[] = {
 	[PDO_TYPE_FIXED] = &source_fixed_supply_type,
 	[PDO_TYPE_BATT]  = &source_battery_type,
 	[PDO_TYPE_VAR]   = &source_variable_supply_type,
 };
 
-static struct device_type *source_apdo_type[] = {
+static const struct device_type *source_apdo_type[] = {
 	[APDO_TYPE_PPS]  = &source_pps_type,
 };
 
-static struct device_type *sink_type[] = {
+static const struct device_type *sink_type[] = {
 	[PDO_TYPE_FIXED] = &sink_fixed_supply_type,
 	[PDO_TYPE_BATT]  = &sink_battery_type,
 	[PDO_TYPE_VAR]   = &sink_variable_supply_type,
 };
 
-static struct device_type *sink_apdo_type[] = {
+static const struct device_type *sink_apdo_type[] = {
 	[APDO_TYPE_PPS]  = &sink_pps_type,
 };
 
 /* REVISIT: Export when EPR_*_Capabilities need to be supported. */
 static int add_pdo(struct usb_power_delivery_capabilities *cap, u32 pdo, int position)
 {
-	struct device_type *type;
+	const struct device_type *type;
 	const char *name;
 	struct pdo *p;
 	int ret;
@@ -460,7 +460,7 @@ static void pd_capabilities_release(struct device *dev)
 	kfree(to_usb_power_delivery_capabilities(dev));
 }
 
-static struct device_type pd_capabilities_type = {
+static const struct device_type pd_capabilities_type = {
 	.name = "capabilities",
 	.release = pd_capabilities_release,
 };
@@ -575,7 +575,7 @@ static void pd_release(struct device *dev)
 	kfree(pd);
 }
 
-static struct device_type pd_type = {
+static const struct device_type pd_type = {
 	.name = "usb_power_delivery",
 	.release = pd_release,
 	.groups = pd_groups,

-- 
2.43.0