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From: Myeonghun Pak <mhun512@gmail.com>
To: stern@rowland.harvard.edu
Cc: gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/3] usb: ohci-platform: Disable controller wakeup on removal
Date: Sun, 13 Sep 2026 18:37:31 -0400	[thread overview]
Message-ID: <20260913223732.92882-3-mhun512@gmail.com> (raw)
In-Reply-To: <20260913223732.92882-1-mhun512@gmail.com>

When OHCI reports remote-wakeup capability, a successful wakeup enable
leaves a source attached after driver unbind: usb_remove_hcd() does not
disable controller wakeup.

Disable it after usb_remove_hcd() to balance the enable.

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

Fixes: fa3364b5a2d7 ("USB: OHCI: Add a generic platform device driver")
Assisted-by: OpenAI:GPT-5.6
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-platform.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index c801527..c2a90a4 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -246,6 +246,7 @@ static void ohci_platform_remove(struct platform_device *dev)
 
 	pm_runtime_get_sync(&dev->dev);
 	usb_remove_hcd(hcd);
+	device_wakeup_disable(&dev->dev);
 
 	if (pdata->power_off)
 		pdata->power_off(dev);

  parent reply	other threads:[~2026-09-13 22:37 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-13 22:37 [PATCH 0/3] usb: host: " Myeonghun Pak
2026-09-13 22:37 ` [PATCH 1/3] usb: ehci-platform: " Myeonghun Pak
2026-09-14 16:07   ` Alan Stern
2026-09-13 22:37 ` Myeonghun Pak [this message]
2026-09-13 22:37 ` [PATCH 3/3] usb: ohci-exynos: " Myeonghun Pak

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