linux-kernel - [PATCH v1 1/1] driver core: Return proper error code when dev_set

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Message-Id: <20230817091221.463721-1-andriy.shevchenko@linux.intel.com>
Date:   Thu, 17 Aug 2023 12:12:21 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Saravana Kannan <saravanak@...gle.com>,
        linux-kernel@...r.kernel.org
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] driver core: Return proper error code when dev_set_name() fails

Whe device_add() tries to assign a device name with help of
dev_set_name() the error path explicitly uses -EINVAL, while
the function may return something different.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/base/core.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 3afb7710ccb5..1a1aecabd5ce 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -3528,18 +3528,17 @@ int device_add(struct device *dev)
 	 * the name, and force the use of dev_name()
 	 */
 	if (dev->init_name) {
-		dev_set_name(dev, "%s", dev->init_name);
+		error = dev_set_name(dev, "%s", dev->init_name);
 		dev->init_name = NULL;
 	}
 
+	if (dev_name(dev))
+		error = 0;
 	/* subsystems can specify simple device enumeration */
-	if (!dev_name(dev) && dev->bus && dev->bus->dev_name)
-		dev_set_name(dev, "%s%u", dev->bus->dev_name, dev->id);
-
-	if (!dev_name(dev)) {
-		error = -EINVAL;
+	else if (dev->bus && dev->bus->dev_name)
+		error = dev_set_name(dev, "%s%u", dev->bus->dev_name, dev->id);
+	if (error)
 		goto name_error;
-	}
 
 	pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
 
-- 
2.40.0.1.gaa8946217a0b