An invalid sensor device was observed which provided valid index and
report_ids for poll, report_state and power_state attributes, but had
invalid report_latency, sensitivity, and timestamp attributes. This would
cause the system to hang when using iio_info to access attributes, as
runtime PM tried to wake up an unresponsive sensor.
[ 2.594565] [453] hid-sensor-hub 0003:0408:5473.0003: Report latency attributes: ffffffff:ffffffff
[ 2.594573] [453] hid-sensor-hub 0003:0408:5473.0003: common attributes: 5:1, 2:1, 3:1 ffffffff:ffffffff ffffffff:ffffffff
[ 2.595485] [453] hid-sensor-hub 0003:0408:5473.0003: Report latency attributes: ffffffff:ffffffff
[ 2.595492] [453] hid-sensor-hub 0003:0408:5473.0003: common attributes: 5:11, 3:11, 1:11 ffffffff:ffffffff ffffffff:ffffffff
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao@xxxxxxxxxxxxx>
---
.../hid-sensors/hid-sensor-attributes.c | 23 +++++++++++--------
1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
index ad1882f608c0..b7ffd97e6c56 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c
@@ -564,8 +564,21 @@ int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev,
} else
st->timestamp_ns_scale = 1000000000;
+ ret = 0;
+ if (st->sensitivity.index < 0 || st->sensitivity_rel.index < 0) {
+ ret = -EINVAL;
+ goto out;
+ }
+
hid_sensor_get_report_latency_info(hsdev, usage_id, st);
+ ret = sensor_hub_get_feature(hsdev,
+ st->power_state.report_id,
+ st->power_state.index, sizeof(value), &value);
+ if (value < 0)
+ ret = -EINVAL;
+
+out:
hid_dbg(hsdev->hdev, "common attributes: %x:%x, %x:%x, %x:%x %x:%x %x:%x\n",
st->poll.index, st->poll.report_id,
st->report_state.index, st->report_state.report_id,
@@ -573,15 +586,7 @@ int hid_sensor_parse_common_attributes(struct hid_sensor_hub_device *hsdev,
st->sensitivity.index, st->sensitivity.report_id,
timestamp.index, timestamp.report_id);
- ret = sensor_hub_get_feature(hsdev,
- st->power_state.report_id,
- st->power_state.index, sizeof(value), &value);
- if (ret < 0)
- return ret;
- if (value < 0)
- return -EINVAL;
-
- return 0;
+ return ret;
}
EXPORT_SYMBOL_NS(hid_sensor_parse_common_attributes, "IIO_HID");
--
2.43.0
