linux-kernel - [PATCH] HID: hid-sensor-hub: Fix issue with devices with no report ID

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Message-Id: <20201103002939.688690-1-pceballos@google.com>
Date:   Mon,  2 Nov 2020 19:29:39 -0500
From:   Pablo Ceballos <pceballos@...gle.com>
To:     Jiri Kosina <jikos@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:     linux-input@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org, Pablo Ceballos <pceballos@...gle.com>
Subject: [PATCH] HID: hid-sensor-hub: Fix issue with devices with no report ID

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@...gle.com>
---
 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 94c7398b5c27..3dd7d3246737 100644
--- a/drivers/hid/hid-sensor-hub.c
+++ b/drivers/hid/hid-sensor-hub.c
@@ -483,7 +483,8 @@ 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);
 
-- 
2.29.1.341.ge80a0c044ae-goog