Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Pablo Ceballos <pceballos@google.com>,
        Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
        Jiri Kosina <jkosina@suse.cz>, Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.9 13/42] HID: hid-sensor-hub: Fix issue with devices with no report ID
Date:   Tue,  1 Dec 2020 09:53:11 +0100
Message-Id: <20201201084642.846849568@linuxfoundation.org>
In-Reply-To: <20201201084642.194933793@linuxfoundation.org>
References: <20201201084642.194933793@linuxfoundation.org>
User-Agent: quilt/0.66
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Pablo Ceballos <pceballos@google.com>

[ Upstream commit 34a9fa2025d9d3177c99351c7aaf256c5f50691f ]

Some HID devices don't use a report ID because they only have a single
report. In those cases, the report ID in struct hid_report will be zero
and the data for the report will start at the first byte, so don't skip
over the first byte.

Signed-off-by: Pablo Ceballos <pceballos@google.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/hid/hid-sensor-hub.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c
index 4ef73374a8f98..7001f07ca3996 100644
--- a/drivers/hid/hid-sensor-hub.c
+++ b/drivers/hid/hid-sensor-hub.c
@@ -489,7 +489,8 @@ static int sensor_hub_raw_event(struct hid_device *hdev,
 		return 1;
 
 	ptr = raw_data;
-	ptr++; /* Skip report id */
+	if (report->id)
+		ptr++; /* Skip report id */
 
 	spin_lock_irqsave(&pdata->lock, flags);
 
-- 
2.27.0