From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C312642C500; Fri, 4 Sep 2026 06:23:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788503002; cv=none; b=QtKqOyWZsT5UF6i9uF1/73mM/TpMeWWOI+cZVKg0r9/QvS9nQ9MgBW6nZWyii4sL7czYI63UDPRbZ7SWwY+kJ2KAfhbTLvJMakSv2s+G8R3Mwph4IF5UobQHhwsy2ZH5HzK1DjQ6Felq+HKYxo67nqYfwlaYfwUeacaVFMzBaxg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788503002; c=relaxed/simple; bh=5Qu0W/YhcLMerkB4KTQWDjMuCxBKXBQ/2tunc6hYfp0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iRBG1sMlb8ZFMMdF/oFrAawygTWstZnPGpLwnl6mI2r1O7Si5LFkgH6E4aiuiIgwyYsiELQemIbmSi3wqR7ioztxTw5m43B0y5HKdhnG0cnbB/Ycuwcb71zLbdHviLWDaiTTt3EsbuDjqJakPEUyowZkJRkVt3HK3q9Acig303k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=mUVNzDaF; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="mUVNzDaF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 280A21F00A3E; Fri, 4 Sep 2026 06:23:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788503001; bh=/HwKKPRTQOVRcpD4VZdMKWDR+gu5M91AledeH1kRmG4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=mUVNzDaFZqn3eZqz5SoEFYVp4n7ryKCTHAnbzYsYFoeRTcTlqxEvdg1KFbFiAswDS Lw9uCLZEfkFFeftIOXp269li6eJGWa2+934p+3Lr2eDc0Au4RnyO35xHeFQ3p2/NTF FAjV6mL++jGCXMorlnBCO/DZoRM6gyYf77kW7MpI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tomasz Figa , Tzung-Bi Shih Subject: [PATCH 6.12 403/403] platform/chrome: sensorhub: Fix dropped timestamp events and log spam Date: Fri, 4 Sep 2026 07:03:26 +0200 Message-ID: <20260904045743.941632619@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260904045734.806166532@linuxfoundation.org> References: <20260904045734.806166532@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tzung-Bi Shih commit 9a3f43b30373c61477d0d3ab52946c05f9492bf9 upstream. Commit 833740a2333c ("platform/chrome: sensorhub: Bound the EC-reported sensor number") evaluated the `sensor_num` against the bounds limit even for timestamp events. A timestamp event typically has a `sensor_num` of 0xff [1], causing the driver to flag it as invalid and skip to the next event. As a result, we'd see a flooding of "Invalid sensor number 255 from EC" warning logs and these timestamp events were being dropped. Move the bounds-check into cros_ec_sensor_ring_process_event() and evaluate it only after standalone timestamp events have already been processed and returned early. [1] https://crrev.com/219ca6ef82ba266da788b673ee4ad50bd3ea1285/common/motion_sense_fifo.c#427 Fixes: 833740a2333c ("platform/chrome: sensorhub: Bound the EC-reported sensor number") Reviewed-by: Tomasz Figa Link: https://lore.kernel.org/r/20260715024454.4127571-1-tzungbi@kernel.org Signed-off-by: Tzung-Bi Shih Signed-off-by: Greg Kroah-Hartman --- drivers/platform/chrome/cros_ec_sensorhub_ring.c | 27 ++++++++++++----------- 1 file changed, 15 insertions(+), 12 deletions(-) --- a/drivers/platform/chrome/cros_ec_sensorhub_ring.c +++ b/drivers/platform/chrome/cros_ec_sensorhub_ring.c @@ -464,6 +464,21 @@ cros_ec_sensor_ring_process_event(struct fifo_timestamp, *current_timestamp, now); + + /* + * A standalone timestamp event typically has a sensor_num of + * 0xff. Return early here to prevent it from hitting the + * bounds check below and spamming the logs. + */ + return false; + } + + /* Skip event if sensor_num from EC is out of bounds. */ + if (in->sensor_num >= sensorhub->sensor_num) { + dev_warn_ratelimited(sensorhub->dev, + "Invalid sensor number %u from EC\n", + in->sensor_num); + return false; } if (in->flags & MOTIONSENSE_SENSOR_FLAG_ODR) { @@ -491,10 +506,6 @@ cros_ec_sensor_ring_process_event(struct return true; } - if (in->flags & MOTIONSENSE_SENSOR_FLAG_TIMESTAMP) - /* If we just have a timestamp, skip this entry. */ - return false; - /* Regular sample */ out->sensor_id = in->sensor_num; trace_cros_ec_sensorhub_data(in->sensor_num, @@ -879,14 +890,6 @@ static void cros_ec_sensorhub_ring_handl for (in = sensorhub->resp->fifo_read.data, j = 0; j < number_data; j++, in++) { - /* Skip event if sensor_num from EC is out of bounds. */ - if (in->sensor_num >= sensorhub->sensor_num) { - dev_warn_ratelimited(sensorhub->dev, - "Invalid sensor number %u from EC\n", - in->sensor_num); - continue; - } - if (cros_ec_sensor_ring_process_event( sensorhub, fifo_info, fifo_timestamp,