linux-kernel - [PATCH] usb: phy: Fix API devm_usb_put

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Message-Id: <20241020-usb_phy_fix-v1-1-7f79243b8e1e@quicinc.com>
Date: Sun, 20 Oct 2024 17:33:42 +0800
From: Zijun Hu <zijun_hu@...oud.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Marc Kleine-Budde <mkl@...gutronix.de>, 
 Sascha Hauer <s.hauer@...gutronix.de>, Felipe Balbi <balbi@...com>
Cc: Zijun Hu <zijun_hu@...oud.com>, linux-arm-kernel@...ts.infradead.org, 
 linux-sunxi@...ts.linux.dev, linux-usb@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Zijun Hu <quic_zijuhu@...cinc.com>, 
 stable@...r.kernel.org
Subject: [PATCH] usb: phy: Fix API devm_usb_put_phy() can not release the
 phy

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

For devm_usb_put_phy(), its comment says it needs to invoke usb_put_phy()
to release the phy, but it does not do that actually, so it can not fully
undo what the API devm_usb_get_phy() does, that is wrong, fixed by using
devres_release() instead of devres_destroy() within the API.

Fixes: cedf8602373a ("usb: phy: move bulk of otg/otg.c to phy/phy.c")
Cc: stable@...r.kernel.org
Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
---
The API is directly used by drivers/usb/musb/sunxi.c, sorry for that
i can't evaluate relevant impact since i know nothing about sunxi.
---
 drivers/usb/phy/phy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c
index 06e0fb23566c..06f789097989 100644
--- a/drivers/usb/phy/phy.c
+++ b/drivers/usb/phy/phy.c
@@ -628,7 +628,7 @@ void devm_usb_put_phy(struct device *dev, struct usb_phy *phy)
 {
 	int r;
 
-	r = devres_destroy(dev, devm_usb_phy_release, devm_usb_phy_match, phy);
+	r = devres_release(dev, devm_usb_phy_release, devm_usb_phy_match, phy);
 	dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n");
 }
 EXPORT_SYMBOL_GPL(devm_usb_put_phy);

---
base-commit: 07b887f8236eb3ed52f1fe83e385e6436dc4b052
change-id: 20241020-usb_phy_fix-9d7c67ef4ab4

Best regards,
-- 
Zijun Hu <quic_zijuhu@...cinc.com>