From mboxrd@z Thu Jan 1 00:00:00 1970 From: Srinivas Pandruvada Subject: [PATCH] HID: hid-sensor-hub: fix report size Date: Sat, 26 Oct 2013 10:04:09 -0700 Message-ID: <1382807049-28478-1-git-send-email-srinivas.pandruvada@linux.intel.com> Return-path: Received: from mga02.intel.com ([134.134.136.20]:64242 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753147Ab3JZREh (ORCPT ); Sat, 26 Oct 2013 13:04:37 -0400 Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: jkosina@suse.cz Cc: linux-input@vger.kernel.org, Srinivas Pandruvada Most of the hid sensor field size is reported in report_size field in the report descriptor. For rotation fusion sensor the quaternion data is 16 byte field, the report size was set to 4 and report count field is set to 4. So the total size is 16 bytes. But the current driver has a bug and not taking account for report count field. This causes user space to see only 4 bytes of data sent via IIO interface. The number of bytes in a field needs to take account of report_count field. Need to multiply report_size and report_count to get total number of bytes. Signed-off-by: Srinivas Pandruvada --- drivers/hid/hid-sensor-hub.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c index 88fc5ae..a184e19 100644 --- a/drivers/hid/hid-sensor-hub.c +++ b/drivers/hid/hid-sensor-hub.c @@ -326,7 +326,8 @@ int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, field->logical == attr_usage_id) { sensor_hub_fill_attr_info(info, i, report->id, field->unit, field->unit_exponent, - field->report_size); + field->report_size * + field->report_count); ret = 0; } else { for (j = 0; j < field->maxusage; ++j) { @@ -338,7 +339,8 @@ int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, i, report->id, field->unit, field->unit_exponent, - field->report_size); + field->report_size * + field->report_count); ret = 0; break; } @@ -425,9 +427,10 @@ static int sensor_hub_raw_event(struct hid_device *hdev, hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", i, report->field[i]->usage->collection_index, report->field[i]->usage->hid, - report->field[i]->report_size/8); - - sz = report->field[i]->report_size/8; + (report->field[i]->report_size * + report->field[i]->report_count)/8); + sz = (report->field[i]->report_size * + report->field[i]->report_count)/8; if (pdata->pending.status && pdata->pending.attr_usage_id == report->field[i]->usage->hid) { hid_dbg(hdev, "data was pending ...\n"); -- 1.8.3.2