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 ED487404BF6; Tue, 21 Jul 2026 21:47:37 +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=1784670459; cv=none; b=YMOlntIMYKXVu/oJqHKrJl7IwrZb+G9F+4Dj3jq5tr5H6le3XfFJGj28Z8O0WGmrfQ13Wefeb4vwvln7jke+Zjwc6il9cVKmUIm7wOMzn4AE0EgVhLioMzvKdwho69NXcQGe4bmJgA1j8mY1iooUj57lGc0yTMu+QPVi0sT6ipc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784670459; c=relaxed/simple; bh=o5t9RCXDlYHcm0QQUf3I9yrdxYM7pIxl5e/z7pmKqFo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IhlGx9XtWFFFyxvPczOmwStgDY0WEspI+24gf+mOE9fXRC0N00HgSL5yvxnkPIuOdO0ju/JhET5qJZ0JxMqdu5ls50NlS0LUV2uRZ2FnB5ClwqRAf1seLCRgAL1aCY/1fWyK1xwcBAF2Kwk8EsvwmJQ1UcYNb3iDAmHuh9Ndpu0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ias1BJ2K; 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="ias1BJ2K" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 59F6E1F000E9; Tue, 21 Jul 2026 21:47:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784670457; bh=Mb0QFLaxQKnNHjcmHQSNy4nKXjJ34223jSSiqe2mdbo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=ias1BJ2KPP7OHl7fsb1KXoCi9HTby5OeLG2waGjdmLMOdZOJI1MqV830HRQ9JjUK5 cfPRQuAMiBpcTvMa5Y67Jxqgh8pn986xsKdC6EjG5hrAq8s7J7U9K5hev4yXijgzaR L/h1IAK16VXf3uA5vWOHQDrApPtyYecA0ZrdYURg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zhang Lixu , Andy Shevchenko , Stable@vger.kernel.org, Jonathan Cameron , Sasha Levin Subject: [PATCH 6.1 0941/1067] iio: hid-sensor-rotation: Fix stale or zero output when reading raw values Date: Tue, 21 Jul 2026 17:25:42 +0200 Message-ID: <20260721152445.583651204@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152424.521567757@linuxfoundation.org> References: <20260721152424.521567757@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 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zhang Lixu [ Upstream commit 3ce8d099e0afc5a7da75a2007a67f67c4f5a4af1 ] When reading the raw quaternion attribute (in_rot_quaternion_raw), the driver currently returns either all zeros (if the sensor was never enabled) or stale data (if the sensor was previously enabled) because it reads from the internal buffer without explicitly requesting a new sample from the sensor. To fix this, power up the sensor, call sensor_hub_input_attr_read_values() to issue a synchronous GET_REPORT and receive the full quaternion data directly into a local buffer, then decode the four components. Fixes: fc18dddc0625 ("iio: hid-sensors: Added device rotation support") Signed-off-by: Zhang Lixu Reviewed-by: Andy Shevchenko Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/iio/orientation/hid-sensor-rotation.c | 40 ++++++++++++++++++++++++-- 1 file changed, 38 insertions(+), 2 deletions(-) --- a/drivers/iio/orientation/hid-sensor-rotation.c +++ b/drivers/iio/orientation/hid-sensor-rotation.c @@ -69,6 +69,13 @@ static int dev_rot_read_raw(struct iio_d long mask) { struct dev_rot_state *rot_state = iio_priv(indio_dev); + struct hid_sensor_hub_device *hsdev = rot_state->common_attributes.hsdev; + struct hid_sensor_hub_attribute_info *info = &rot_state->quaternion; + u32 usage_id = HID_USAGE_SENSOR_ORIENT_QUATERNION; + union { + s16 val16[4]; + s32 val32[4]; + } raw_buf; int ret_type; int i; @@ -78,8 +85,37 @@ static int dev_rot_read_raw(struct iio_d switch (mask) { case IIO_CHAN_INFO_RAW: if (size >= 4) { - for (i = 0; i < 4; ++i) - vals[i] = rot_state->scan.sampled_vals[i]; + if (info->size <= 0 || info->size > sizeof(raw_buf)) + return -EINVAL; + + hid_sensor_power_state(&rot_state->common_attributes, true); + + ret_type = sensor_hub_input_attr_read_values(hsdev, + hsdev->usage, + usage_id, + info->report_id, + SENSOR_HUB_SYNC, + info->size, + (u8 *)&raw_buf); + + hid_sensor_power_state(&rot_state->common_attributes, false); + + if (ret_type < 0) + return ret_type; + + switch (info->size) { + case sizeof(raw_buf.val16): + for (i = 0; i < ARRAY_SIZE(raw_buf.val16); i++) + vals[i] = raw_buf.val16[i]; + break; + case sizeof(raw_buf.val32): + for (i = 0; i < ARRAY_SIZE(raw_buf.val32); i++) + vals[i] = raw_buf.val32[i]; + break; + default: + return -EINVAL; + } + ret_type = IIO_VAL_INT_MULTIPLE; *val_len = 4; } else