Hi Dan,
On Wednesday 06 November 2013 01:24 PM, Dan Carpenter wrote:
> If this was called with a NULL "dev" then it lead to a NULL dereference
> when we called dev_WARN(). I have changed it to WARN_ON() so that we
> get a stack dump and can fix the caller.
>
> If ida_simple_get() failed then there was a missing call to kfree(phy).
>
> The rest of this patch is just cleanup like returning directly instead
> of having do-nothing gotos. Using descriptive labels instead of
> GW-BASIC style "err0" and "err1". I also flipped the order of
> put_device() and ida_remove() so they are a mirror reflection of the
> order they were allocated.
>
> Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Can you create this patch on top of
git://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux-phy.git fixes ?
Thanks
Kishon
>
> diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
> index 03cf8fb..18b9de7 100644
> --- a/drivers/phy/phy-core.c
> +++ b/drivers/phy/phy-core.c
> @@ -437,23 +437,18 @@ struct phy *phy_create(struct device *dev, const struct
> phy_ops *ops,
> int id;
> struct phy *phy;
>
> - if (!dev) {
> - dev_WARN(dev, "no device provided for PHY\n");
> - ret = -EINVAL;
> - goto err0;
> - }
> + if (WARN_ON(!dev))
> + return ERR_PTR(-EINVAL);
>
> phy = kzalloc(sizeof(*phy), GFP_KERNEL);
> - if (!phy) {
> - ret = -ENOMEM;
> - goto err0;
> - }
> + if (!phy)
> + return ERR_PTR(-ENOMEM);
>
> id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL);
> if (id < 0) {
> dev_err(dev, "unable to get id\n");
> ret = id;
> - goto err0;
> + goto free_phy;
> }
>
> device_initialize(&phy->dev);
> @@ -468,11 +463,11 @@ struct phy *phy_create(struct device *dev, const struct
> phy_ops *ops,
>
> ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id);
> if (ret)
> - goto err1;
> + goto put_dev;
>
> ret = device_add(&phy->dev);
> if (ret)
> - goto err1;
> + goto put_dev;
>
> if (pm_runtime_enabled(dev)) {
> pm_runtime_enable(&phy->dev);
> @@ -481,12 +476,12 @@ struct phy *phy_create(struct device *dev, const struct
> phy_ops *ops,
>
> return phy;
>
> -err1:
> - ida_remove(&phy_ida, phy->id);
> +put_dev:
> put_device(&phy->dev);
> + ida_remove(&phy_ida, phy->id);
> +free_phy:
> kfree(phy);
>
> -err0:
> return ERR_PTR(ret);
> }
> EXPORT_SYMBOL_GPL(phy_create);
>
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