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phy: core: Get a refcount to phy in devm_of_phy_get_by_index() 

On driver detach, devm_phy_release() will put a refcount to
the phy, so gets a refconut to it before return.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
steinar/wifi_calib_4_9_kernel
Chunfeng Yun 2015-12-04 10:06:29 +08:00 committed by Kishon Vijay Abraham I
parent a8c24724dd
commit 708744628b
1 changed files with 15 additions and 6 deletions
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21
drivers/phy/phy-core.c
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@ -636,8 +636,9 @@ EXPORT_SYMBOL_GPL(devm_of_phy_get);
* @np: node containing the phy
* @index: index of the phy
*
* Gets the phy using _of_phy_get(), and associates a device with it using
* devres. On driver detach, release function is invoked on the devres data,
* Gets the phy using _of_phy_get(), then gets a refcount to it,
* and associates a device with it using devres. On driver detach,
* release function is invoked on the devres data,
* then, devres data is freed.
*
*/
@ -651,13 +652,21 @@ struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
return ERR_PTR(-ENOMEM);
phy = _of_phy_get(np, index);
if (!IS_ERR(phy)) {
*ptr = phy;
devres_add(dev, ptr);
} else {
if (IS_ERR(phy)) {
devres_free(ptr);
return phy;
}
if (!try_module_get(phy->ops->owner)) {
devres_free(ptr);
return ERR_PTR(-EPROBE_DEFER);
}
get_device(&phy->dev);
*ptr = phy;
devres_add(dev, ptr);
return phy;
}
EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index);