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From: Myeonghun Pak <mhun512@gmail.com>
To: Alan Stern <stern@rowland.harvard.edu>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>,
	Peter Griffin <peter.griffin@linaro.org>,
	Alim Akhtar <alim.akhtar@samsung.com>,
	Patrice Chotard <patrice.chotard@foss.st.com>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, stable@vger.kernel.org
Subject: [PATCH 2/4] usb: ohci-s3c2410: disable controller wakeup on removal
Date: Mon, 14 Sep 2026 21:20:09 -0400	[thread overview]
Message-ID: <20260915012011.61874-3-mhun512@gmail.com> (raw)
In-Reply-To: <20260915012011.61874-1-mhun512@gmail.com>

Probe enables controller wakeup after the OHCI core marks controllers with
RemoteWakeupConnected as wakeup-capable. Removal does not undo this, so the
wakeup source can remain attached after driver unbind.

Disable controller wakeup after removing the HCD.

This issue was identified during our ongoing static-analysis research
while reviewing kernel code.

Fixes: a6eeeb9f45b5 ("USB: Update USB default wakeup settings")
Cc: stable@vger.kernel.org
Assisted-by: LLM
Co-developed-by: Ijae Kim <ae878000@gmail.com>
Signed-off-by: Ijae Kim <ae878000@gmail.com>
Signed-off-by: Myeonghun Pak <mhun512@gmail.com>
---
 drivers/usb/host/ohci-s3c2410.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c
--- a/drivers/usb/host/ohci-s3c2410.c
+++ b/drivers/usb/host/ohci-s3c2410.c
@@ -335,6 +335,7 @@
 	struct usb_hcd *hcd = platform_get_drvdata(dev);
 
 	usb_remove_hcd(hcd);
+	device_wakeup_disable(hcd->self.controller);
 	s3c2410_stop_hc(dev);
 	usb_put_hcd(hcd);
 }

  parent reply	other threads:[~2026-09-15  1:20 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-15  1:20 [PATCH 0/4] usb: ohci: Balance controller wakeup on cleanup Myeonghun Pak
2026-09-15  1:20 ` [PATCH 1/4] usb: ohci-da8xx: disable " Myeonghun Pak
2026-09-15  1:20 ` Myeonghun Pak [this message]
2026-09-15  1:20 ` [PATCH 3/4] usb: ohci-spear: disable controller wakeup on removal Myeonghun Pak
2026-09-15  1:20 ` [PATCH 4/4] usb: ohci-st: " Myeonghun Pak
2026-09-15  9:34   ` Patrice CHOTARD
2026-09-15  9:34   ` Patrice CHOTARD

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