From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f170.google.com (mail-pg1-f170.google.com [209.85.215.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AE3883D5660 for ; Fri, 4 Sep 2026 23:58:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788566290; cv=none; b=Y4vOEjKJEM+S50F5Qbk1XuLZVSkS7uxzbldd0Txnl1eHAWNi0jD5kBg+CcIbHHwai7LjJ4jaLFTyXf1QEe1NLe+17y3IJTHOsmf/tQL3AYVcWXw6vGeQoi8wbpSSw1U+VCqK8nqhiJC3wmh+TQ0BxbJwCWlIU8OdWt7Mb/zhxPg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788566290; c=relaxed/simple; bh=yarXFOpzqWnE+NW5HpWbsJFTGBY6u5WOzXmPUw7r07w=; h=Date:From:To:CC:Subject:In-Reply-To:References:Message-ID: MIME-Version:Content-Type; b=OYKdb5H8bqCPz4ggJTSDqDRUXbSrVZ1w1biPuOoYXEvMIVktdC1+8X5Hzybf3jIRkR6Jdp3slAZwXp2i7Y9Dj5G4UBvPXkuFASnvF5mQOfyiGnZYRlezkxtk3QbW5K2R5cJE0emGxege0RSOHB6FlHS887XnHCVidSdjmAlNK1Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=YOK4NB/S; arc=none smtp.client-ip=209.85.215.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="YOK4NB/S" Received: by mail-pg1-f170.google.com with SMTP id 41be03b00d2f7-cc1c73645a1so1331580a12.1 for ; Fri, 04 Sep 2026 16:58:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788566288; x=1789171088; darn=vger.kernel.org; h=content-transfer-encoding:content-type:mime-version:message-id :references:in-reply-to:user-agent:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to:content-type; bh=fd2qPCapWM+8MBnNjVnfMcoloTL66/axX8ypoPSpRK0=; b=YOK4NB/S1+IqAqXjnS5bJ/cKOaPYeKZOQirQ5tpLSZ/W+QGcW+GeEmBVNIUjL0RWA6 8+E7mscIE+7Sz3Bf+MKrCrJbym0wQy6TzVOQ8p+3+7TUmwsor0HwfNv+PwuCG1ChOSjH 9Iaw2xzIcotTiFa/lUzgg9QNIv28wyCi0R6Dx+tJJxlJIRqNbhevfHMlk7hIYGXyWvAV HNJCux6nS9ttaH3InO2jfUfz5hnrJ5kHzEYSrzayTG9Q7vb6WuHqazk8DADTAWXTQHuA YXm07N6o9oWgeMa/hmhVvPT4ox0W4+w0jHMpfGJaqRT9DBdell5u1AggZxejU0dwvUyp SpaA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788566288; x=1789171088; h=content-transfer-encoding:content-type:mime-version:message-id :references:in-reply-to:user-agent:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=fd2qPCapWM+8MBnNjVnfMcoloTL66/axX8ypoPSpRK0=; b=KpONQ+JwuKFZC1yJZG/W8yzkVZorgIrKTn8RCy0gWSRYk7Se4oEm89o+jn0wF1/vJz SWOiaWtsMtRnxBktgPZB5LLbumY9x1St1zduFCrLfssk4HGDX/ESTzQLyXvGH3UjFEZs 2RL+ZUDWxwi9MLYqb2ZJ65IXS9UumH4zJh6oSyeHOLxQjxA0OpoBS6dAaDZb2gY4whzz rBQ8iZZYdN3PyXpimUxubwuKJ+1/wsAsB6jCWPgGvW6TXxOtee1Yi7ITjgfnupxK1Vo/ 90ZZYt2Dp0y8yK6mqdc0KMdBVSXjuXguHEmGkiGNni8MaKoOwAJxzv15o719HZl5+0/r iyMA== X-Gm-Message-State: AFuF++m0zfhtt+faywhxuOgskMsbKPaJLjLKP4fafS6X1pR39poKtg3I 5LqPpe52KIYvKSN9dxSj+uCDSAFr3/u3eVVBfIAQWLu4NnVTJHGevW3E X-Gm-Gg: AYBFou1Z/lRiI1Jzx0YKG8xbhp/TLqV7urflQS0fF0QFtoc68P7HzWXKeWFerBt1XTD L1b4PQgkbb8WVe/wShpYa48MSdKIQZF/e+KGiXZ+XRsQ4Z0E1gQ6GGLTILQ6qThyEFWvCSkUMom wI6OeD7w9/Itj3jQQOJQje4cn3xYRzLiEhpn9w0idqCosrcMjLMmw5i2R2OMVYiHaZJtt0OrZf1 eF8HYITmTQB2P3JGH6E/yxdfkRP1TuibqyDfgeRG+b/4dXxforvCsqgXrX61zqjYxjN0t/skaun 5InxhLsPjRWyxjBah8vwz5TGCwUNkV0Y91m/+eRis1TZ39ofM+MShwvX5nLC51LT/fs23nENXFB UrU6kbfBHHgQt+JVYqyApqYQT6z4z2t46XVAhX+UoJKASAxq+2j732nIhjxzwg8kaLT+aoiknR0 q/CAGoOU3VvPKTOBitP4wHDdLsOihCQyil9Nm1Ule79RSx+Tgdi17Cn/FUhYuerZYMJcJnHwpk+ g== X-Received: by 2002:a05:6a21:828c:b0:3d1:39e9:b267 with SMTP id adf61e73a8af0-3da39b721f7mr14030650637.3.1788566287848; Fri, 04 Sep 2026 16:58:07 -0700 (PDT) Received: from ehlo.thunderbird.net ([76.91.223.1]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3339befe870sm10577251eec.30.2026.09.04.16.58.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 04 Sep 2026 16:58:07 -0700 (PDT) Date: Fri, 04 Sep 2026 16:58:07 -0700 From: "Derek J. Clark" To: Tristan Madani , 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 User-Agent: Thunderbird for Android In-Reply-To: <178855662286.3192124.2102579968112413785@gmail.com> References: <20260904105800.3923987-1-tristmd@gmail.com> <949B786B-375B-4F2F-B209-C135EC62E1A5@gmail.com> <178855662286.3192124.2102579968112413785@gmail.com> Message-ID: Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On September 4, 2026 2:17:02 PM PDT, Tristan Madani w= rote: >Hi Derek, > >Thanks for the review=2E > >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()=2E 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)=2E > >The non-sync cancel_delayed_work() didn't trigger this because it >never calls __flush_work()=2E > >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=2E > If the usage page rejects init then I think we can safely assume that it w= ill be an effective gate=2E There's a series in the works ATM that will make drvdata unique per hid de= v after the usage page checka, so we could also wait for that and if it's n= ot fixed by that series then gate on drvdata not being NULL=2E Cheers, Derek >Thanks, >Tristan