linux-kernel - [PATCH v2 2/5] extcon: Get rid of not really used name field in struct extcon

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230405152745.24959-3-andriy.shevchenko@linux.intel.com>
Date:   Wed,  5 Apr 2023 18:27:42 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Chanwoo Choi <cw00.choi@...sung.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Cc:     MyungJoo Ham <myungjoo.ham@...sung.com>
Subject: [PATCH v2 2/5] extcon: Get rid of not really used name field in struct extcon_dev

The name field is always set to the parent device name and never
altered. No need to keep it inside the struct extcon_dev as we
always may derive it from the dev_name(edev->dev.parent) call.

Moreover, the parent device pointer won't ever be NULL, otherwise
we may not allocate the extcon device at all.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/extcon/extcon.c | 12 +++---------
 drivers/extcon/extcon.h |  3 ---
 2 files changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 47819c5144d5..75a0147703c0 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -387,7 +387,7 @@ static ssize_t name_show(struct device *dev, struct device_attribute *attr,
 {
 	struct extcon_dev *edev = dev_get_drvdata(dev);
 
-	return sysfs_emit(buf, "%s\n", edev->name);
+	return sysfs_emit(buf, "%s\n", dev_name(edev->dev.parent));
 }
 static DEVICE_ATTR_RO(name);
 
@@ -885,7 +885,7 @@ struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
 
 	mutex_lock(&extcon_dev_list_lock);
 	list_for_each_entry(sd, &extcon_dev_list, entry) {
-		if (!strcmp(sd->name, extcon_name))
+		if (device_match_name(sd->dev.parent, extcon_name))
 			goto out;
 	}
 	sd = ERR_PTR(-EPROBE_DEFER);
@@ -1269,12 +1269,6 @@ int extcon_dev_register(struct extcon_dev *edev)
 	edev->dev.class = extcon_class;
 	edev->dev.release = extcon_dev_release;
 
-	edev->name = dev_name(edev->dev.parent);
-	if (IS_ERR_OR_NULL(edev->name)) {
-		dev_err(&edev->dev,
-			"extcon device name is null\n");
-		return -EINVAL;
-	}
 	dev_set_name(&edev->dev, "extcon%lu",
 			(unsigned long)atomic_inc_return(&edev_no));
 
@@ -1465,7 +1459,7 @@ EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle);
  */
 const char *extcon_get_edev_name(struct extcon_dev *edev)
 {
-	return !edev ? NULL : edev->name;
+	return edev ? dev_name(edev->dev.parent) : NULL;
 }
 EXPORT_SYMBOL_GPL(extcon_get_edev_name);
 
diff --git a/drivers/extcon/extcon.h b/drivers/extcon/extcon.h
index 49e4ed9f6450..9ce7042606d7 100644
--- a/drivers/extcon/extcon.h
+++ b/drivers/extcon/extcon.h
@@ -6,8 +6,6 @@
 
 /**
  * struct extcon_dev - An extcon device represents one external connector.
- * @name:		The name of this extcon device. Parent device name is
- *			used if NULL.
  * @supported_cable:	Array of supported cable names ending with EXTCON_NONE.
  *			If supported_cable is NULL, cable name related APIs
  *			are disabled.
@@ -40,7 +38,6 @@
  */
 struct extcon_dev {
 	/* Optional user initializing data */
-	const char *name;
 	const unsigned int *supported_cable;
 	const u32 *mutually_exclusive;
 
-- 
2.40.0.1.gaa8946217a0b