This is a note to let you know that I've just added the patch titled
HID: hid-sensor-hub: fix report size
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hid-hid-sensor-hub-fix-report-size.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d4b1bba76171cb783e32441b28462fe841073ed8 Mon Sep 17 00:00:00 2001
From: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
Date: Sat, 26 Oct 2013 10:04:09 -0700
Subject: HID: hid-sensor-hub: fix report size
From: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
commit d4b1bba76171cb783e32441b28462fe841073ed8 upstream.
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 <srinivas.pandruvada@xxxxxxxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hid/hid-sensor-hub.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
--- 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(
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(
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 h
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");
Patches currently in stable-queue which might be from srinivas.pandruvada@xxxxxxxxxxxxxxx are
queue-3.12/hid-hid-sensor-hub-fix-report-size.patch
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