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Fri, 06 Nov 2026 18:36:44 -0800 (PST) Received: from cantal.lan ([58.136.77.237]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-36faa4b4680sm10421618eec.20.2026.11.06.18.36.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Nov 2026 18:36:43 -0800 (PST) From: James Clark To: Greg Kroah-Hartman , Alan Stern , Matthias Kaehlcke Cc: Johan Hovold , Bastien Nocera , Arnd Bergmann , Bartosz Golaszewski , Douglas Anderson , Robert Nelson , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, regressions@lists.linux.dev Subject: [PATCH v5 0/2] usb: misc: onboard_usb_dev: don't defer probing after the device is configured Date: Sat, 7 Nov 2026 09:36:36 +0700 Message-ID: X-Mailer: git-send-email 2.56.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On a BeagleY-AI, kernels since commit f918e3804498 ("arm64: enable HAVE_SHARED_GPIOS for all ARM64 platforms") no longer boot: the on-board USB hub is re-probed in a loop, because onboard_usb_dev defers probing after the hub has been configured. Following Johan Hovold's suggestion [1], patch 1 exports the generic driver's operations, and patch 2 changes onboard_usb_dev to call them itself instead of setting generic_subclass, so that it can defer probing before the device is configured. Tested on the BeagleY-AI on top of v7.4-rc1: the board boots normally, and unbinding and rebinding the onboard-usb-dev platform device works. With the peer-hub property removed from one hub's node, that hub binds to the generic driver. I used an LLM coding assistant to help prepare this series. Changes in v5: - Patch 1: added Alan's Acked-by - Patch 2: stopped matching a device that has no platform device, so that the generic driver binds it (Sashiko) - Link to v4: https://lore.kernel.org/all/cover.1793941292.git.jjc@jclark.com/ Changes in v4: - Switched to calling the generic driver's operations from onboard_usb_dev, instead of adding pre_probe to the USB core - Link to v3: https://lore.kernel.org/all/cover.1793669297.git.jjc@jclark.com/ Changes in v3: - Added a patch fixing existing problems in usb_probe_device() (Alan) - Link to v2: https://lore.kernel.org/all/20261030151919.3511106-1-jjc@jclark.com/ Changes in v2: - Switched to adding a pre_probe callback to the USB core (Johan) - Link to v1: https://lore.kernel.org/all/20261030114705.3159093-1-jjc@jclark.com/ [1] https://lore.kernel.org/all/auSdA8MfolA8OhdM@hovoldconsulting.com/ James Clark (2): usb: core: export the generic device driver's operations usb: misc: onboard_usb_dev: don't defer probing after the device is configured drivers/usb/core/generic.c | 4 ++ drivers/usb/core/usb.h | 6 --- drivers/usb/misc/onboard_usb_dev.c | 67 +++++++++++++++++++++--------- include/linux/usb.h | 10 ++++- 4 files changed, 61 insertions(+), 26 deletions(-) base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4 -- 2.56.0