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phy: core: Fix that API devm_of_phy_provider_unregister() fails to unregister the phy provider

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For devm_of_phy_provider_unregister(), its comment says it needs to invoke
of_phy_provider_unregister() to unregister the phy provider, but it will
not actually invoke the function since devres_destroy() does not call
devm_phy_provider_release(), and the missing of_phy_provider_unregister()
call will cause:

- The phy provider fails to be unregistered.
- Leak both memory and the OF node refcount.

Fortunately, the faulty API has not been used by current kernel tree.
Fix by using devres_release() instead of devres_destroy() within the API.

Fixes: ff76496347 ("drivers: phy: add generic PHY framework")
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
Link: https://lore.kernel.org/stable/20241213-phy_core_fix-v6-2-40ae28f5015a%40quicinc.com
Link: https://lore.kernel.org/r/20241213-phy_core_fix-v6-2-40ae28f5015a@quicinc.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Zijun Hu 2024-12-13 20:36:42 +08:00 committed by Vinod Koul
parent fe4bfa9b6d
commit c0b82ab95b
1 changed files with 3 additions and 3 deletions
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6
drivers/phy/phy-core.c
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@ -1259,12 +1259,12 @@ EXPORT_SYMBOL_GPL(of_phy_provider_unregister);
* of_phy_provider_unregister to unregister the phy provider.
*/
void devm_of_phy_provider_unregister(struct device *dev,
struct phy_provider *phy_provider)
struct phy_provider *phy_provider)
{
int r;
r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match,
phy_provider);
r = devres_release(dev, devm_phy_provider_release, devm_phy_match,
phy_provider);
dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n");
}
EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister);