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[108.228.232.20]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1831acba710sm12128429c88.13.2026.10.16.18.40.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Oct 2026 18:40:09 -0700 (PDT) From: "Derek J. Clark" To: Jiri Kosina , Benjamin Tissoires Cc: "Pierre-Loup A . Griffais" , "Derek J . Clark" , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@lists.opengamingcollective.org, stable@vger.kernel.org Subject: [PATCH v2 03/11] HID: hid-lenovo-go-s: Prevent deadlock if device removed during setup Date: Fri, 16 Oct 2026 18:39:48 -0700 Message-ID: <20261017013956.2440130-4-derekjohn.clark@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20261017013956.2440130-1-derekjohn.clark@gmail.com> References: <20261017013956.2440130-1-derekjohn.clark@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit hid_gos_cfg_remove() calls a mutex before canceling delayed work. That delayed work function calls mcu_property_out(), which holds the same mutex. Prevent deadlock by removing the mutex. Additionally, since cancel_delayed_work has the potential to re-arm, switch to disable_delayed_work. Retaking the mutex before removing attributes could deadlock on store() as well, so don't retake the mutex. Fixes: a23f3497bf208c59ad ("HID: hid-lenovo-go-s: Add Lenovo Legion Go S Series HID Driver") Cc: stable@vger.kernel.org Signed-off-by: Derek J. Clark --- drivers/hid/hid-lenovo-go-s.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/hid/hid-lenovo-go-s.c b/drivers/hid/hid-lenovo-go-s.c index e979527ece8e..b27e82ec9b76 100644 --- a/drivers/hid/hid-lenovo-go-s.c +++ b/drivers/hid/hid-lenovo-go-s.c @@ -1445,9 +1445,9 @@ static int hid_gos_cfg_probe(struct hid_device *hdev, static void hid_gos_cfg_remove(struct hid_device *hdev) { - guard(mutex)(&drvdata.cfg_mutex); - cancel_delayed_work_sync(&drvdata.gos_cfg_setup); + disable_delayed_work_sync(&drvdata.gos_cfg_setup); sysfs_remove_groups(&hdev->dev.kobj, top_level_attr_groups); + hid_hw_close(hdev); hid_hw_stop(hdev); hid_set_drvdata(hdev, NULL); -- 2.55.0