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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2021-08-11 15:48:45 +0300
committerJakub Kicinski <kuba@kernel.org>2021-08-12 19:53:02 +0300
commitd9d5b8961284b0051726e0fcda91d1e297e087f5 (patch)
tree986a08a3f91835c25638b3dc4d99f8e4b64b2360 /drivers/net/wwan
parent700fa08da43edb0af3e6a513f0255443e96088e8 (diff)
downloadlinux-d9d5b8961284b0051726e0fcda91d1e297e087f5.tar.xz
wwan: core: Avoid returning NULL from wwan_create_dev()
Make wwan_create_dev() to return either valid or error pointer, In some cases it may return NULL. Prevent this by converting it to the respective error pointer. Fixes: 9a44c1cc6388 ("net: Add a WWAN subsystem") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Sergey Ryazanov <ryazanov.s.a@gmail.com> Reviewed-by: Loic Poulain <loic.poulain@linaro.org> Link: https://lore.kernel.org/r/20210811124845.10955-1-andriy.shevchenko@linux.intel.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/wwan')
-rw-r--r--drivers/net/wwan/wwan_core.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/net/wwan/wwan_core.c b/drivers/net/wwan/wwan_core.c
index 674a81d79db3..35ece98134c0 100644
--- a/drivers/net/wwan/wwan_core.c
+++ b/drivers/net/wwan/wwan_core.c
@@ -164,11 +164,14 @@ static struct wwan_device *wwan_create_dev(struct device *parent)
goto done_unlock;
id = ida_alloc(&wwan_dev_ids, GFP_KERNEL);
- if (id < 0)
+ if (id < 0) {
+ wwandev = ERR_PTR(id);
goto done_unlock;
+ }
wwandev = kzalloc(sizeof(*wwandev), GFP_KERNEL);
if (!wwandev) {
+ wwandev = ERR_PTR(-ENOMEM);
ida_free(&wwan_dev_ids, id);
goto done_unlock;
}
@@ -182,7 +185,8 @@ static struct wwan_device *wwan_create_dev(struct device *parent)
err = device_register(&wwandev->dev);
if (err) {
put_device(&wwandev->dev);
- wwandev = NULL;
+ wwandev = ERR_PTR(err);
+ goto done_unlock;
}
done_unlock:
@@ -1014,8 +1018,8 @@ int wwan_register_ops(struct device *parent, const struct wwan_ops *ops,
return -EINVAL;
wwandev = wwan_create_dev(parent);
- if (!wwandev)
- return -ENOMEM;
+ if (IS_ERR(wwandev))
+ return PTR_ERR(wwandev);
if (WARN_ON(wwandev->ops)) {
wwan_remove_dev(wwandev);