linux-kernel - [PATCH v2 3/6] phy: core: Fix that API devm_phy

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Message-Id: <20241024-phy_core_fix-v2-3-fc0c63dbfcf3@quicinc.com>
Date: Thu, 24 Oct 2024 22:39:28 +0800
From: Zijun Hu <zijun_hu@...oud.com>
To: Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, Felipe Balbi <balbi@...com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Rob Herring <robh@...nel.org>, Arnd Bergmann <arnd@...db.de>, 
 Lee Jones <lee@...nel.org>
Cc: Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kw@...ux.com>, 
 Bjorn Helgaas <bhelgaas@...gle.com>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Christophe JAILLET <christophe.jaillet@...adoo.fr>, 
 Zijun Hu <zijun_hu@...oud.com>, stable@...r.kernel.org, 
 linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Zijun Hu <quic_zijuhu@...cinc.com>
Subject: [PATCH v2 3/6] phy: core: Fix that API devm_phy_destroy() fails to
 destroy the phy

From: Zijun Hu <quic_zijuhu@...cinc.com>

For devm_phy_destroy(), its comment says it needs to invoke phy_destroy()
to destroy the phy, but it does not invoke the function actually since
devres_destroy() will not call devm_phy_consume() at all which will call
the function, and the missing phy_destroy() call will case that the phy
fails to be destroyed.

Fixed by using devres_release() instead of devres_destroy() within the API.

Fixes: ff764963479a ("drivers: phy: add generic PHY framework")
Cc: stable@...r.kernel.org
Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
---
 drivers/phy/phy-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index de07e1616b34..52ca590a58b9 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -1121,7 +1121,7 @@ void devm_phy_destroy(struct device *dev, struct phy *phy)
 {
 	int r;

-	r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy);
+	r = devres_release(dev, devm_phy_consume, devm_phy_match, phy);
 	dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
 }
 EXPORT_SYMBOL_GPL(devm_phy_destroy);

-- 
2.34.1