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[88.170.213.78]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49ce591f846sm102532995e9.1.2026.09.04.14.17.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Sep 2026 14:17:03 -0700 (PDT) From: Tristan Madani To: Derek J. Clark , Jiri Kosina , Benjamin Tissoires Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Tristan Madani Subject: Re: [PATCH] HID: hid-oxp: use cancel_delayed_work_sync() in remove Date: Fri, 04 Sep 2026 21:17:02 -0000 Message-ID: <178855662286.3192124.2102579968112413785@gmail.com> In-Reply-To: <949B786B-375B-4F2F-B209-C135EC62E1A5@gmail.com> References: <20260904105800.3923987-1-tristmd@gmail.com> <949B786B-375B-4F2F-B209-C135EC62E1A5@gmail.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi Derek, Thanks for the review. One thing the Sashiko bot flagged, and I think it's valid: if oxp_hid_probe() returns early on an unknown usage page (the default: return 0 path), the delayed work items are never initialized via INIT_DELAYED_WORK(). In that case, cancel_delayed_work_sync() in remove() would call __flush_work() on a zero-filled work struct, which hits WARN_ON(!work->func). The non-sync cancel_delayed_work() didn't trigger this because it never calls __flush_work(). Do you think this path is actually reachable in practice, or are the usage page IDs exhaustive for all matched devices? If it can happen, I can send a v2 that guards the cancels. Thanks, Tristan