linux-kernel - [PATCH] net: wwan: call ida_free when device

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Message-ID: <20220708020223.4234-1-liubo03@inspur.com>
Date:   Thu, 7 Jul 2022 22:02:23 -0400
From:   Bo Liu <liubo03@...pur.com>
To:     <loic.poulain@...aro.org>, <ryazanov.s.a@...il.com>,
        <johannes@...solutions.net>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Bo Liu <liubo03@...pur.com>
Subject: [PATCH] net: wwan: call ida_free when device_register fails

when device_register() fails, we should call ida_free().

Signed-off-by: Bo Liu <liubo03@...pur.com>
---
 drivers/net/wwan/wwan_core.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wwan/wwan_core.c b/drivers/net/wwan/wwan_core.c
index b8c7843730ed..0f653e320b2b 100644
--- a/drivers/net/wwan/wwan_core.c
+++ b/drivers/net/wwan/wwan_core.c
@@ -228,8 +228,7 @@ static struct wwan_device *wwan_create_dev(struct device *parent)
 	wwandev = kzalloc(sizeof(*wwandev), GFP_KERNEL);
 	if (!wwandev) {
 		wwandev = ERR_PTR(-ENOMEM);
-		ida_free(&wwan_dev_ids, id);
-		goto done_unlock;
+		goto error_free_ida;
 	}
 
 	wwandev->dev.parent = parent;
@@ -242,7 +241,7 @@ static struct wwan_device *wwan_create_dev(struct device *parent)
 	if (err) {
 		put_device(&wwandev->dev);
 		wwandev = ERR_PTR(err);
-		goto done_unlock;
+		goto error_free_ida;
 	}
 
 #ifdef CONFIG_WWAN_DEBUGFS
@@ -251,6 +250,8 @@ static struct wwan_device *wwan_create_dev(struct device *parent)
 					   wwan_debugfs_dir);
 #endif
 
+error_free_ida:
+	ida_free(&wwan_dev_ids, id);
 done_unlock:
 	mutex_unlock(&wwan_register_lock);
 
@@ -448,8 +449,7 @@ struct wwan_port *wwan_create_port(struct device *parent,
 	port = kzalloc(sizeof(*port), GFP_KERNEL);
 	if (!port) {
 		err = -ENOMEM;
-		ida_free(&minors, minor);
-		goto error_wwandev_remove;
+		goto error_free_ida;
 	}
 
 	port->type = type;
@@ -484,6 +484,8 @@ struct wwan_port *wwan_create_port(struct device *parent,
 
 error_put_device:
 	put_device(&port->dev);
+error_free_ida:
+	ida_free(&minors, minor);
 error_wwandev_remove:
 	wwan_remove_dev(wwandev);
 
-- 
2.27.0