rtc: rtc-hid-sensor-time: allow 16 and 32 bit values for all attributes.
There is no real reason to not support 16 or 32 bit values too.
Signed-off-by: Alexander Holler <holler@ahsoftware.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/rtc/rtc-hid-sensor-time.c b/drivers/rtc/rtc-hid-sensor-time.c
index b8c1b10..7273b01 100644
--- a/drivers/rtc/rtc-hid-sensor-time.c
+++ b/drivers/rtc/rtc-hid-sensor-time.c
@@ -76,6 +76,20 @@
return 0;
}
+static u32 hid_time_value(size_t raw_len, char *raw_data)
+{
+ switch (raw_len) {
+ case 1:
+ return *(u8 *)raw_data;
+ case 2:
+ return *(u16 *)raw_data;
+ case 4:
+ return *(u32 *)raw_data;
+ default:
+ return (u32)(~0U); /* 0xff... or -1 to denote an error */
+ }
+}
+
static int hid_time_capture_sample(struct hid_sensor_hub_device *hsdev,
unsigned usage_id, size_t raw_len,
char *raw_data, void *priv)
@@ -85,29 +99,35 @@
switch (usage_id) {
case HID_USAGE_SENSOR_TIME_YEAR:
+ /*
+ * The draft for HID-sensors (HUTRR39) currently doesn't define
+ * the range for the year attribute. Therefor we support
+ * 8 bit (0-99) and 16 or 32 bits (full) as size for the year.
+ */
if (raw_len == 1) {
time_buf->tm_year = *(u8 *)raw_data;
if (time_buf->tm_year < 70)
/* assume we are in 1970...2069 */
time_buf->tm_year += 100;
} else
- time_buf->tm_year = *(u16 *)raw_data-1900;
+ time_buf->tm_year =
+ (int)hid_time_value(raw_len, raw_data)-1900;
break;
case HID_USAGE_SENSOR_TIME_MONTH:
- /* sensor sending the month as 1-12, we need 0-11 */
- time_buf->tm_mon = *(u8 *)raw_data-1;
+ /* sensors are sending the month as 1-12, we need 0-11 */
+ time_buf->tm_mon = (int)hid_time_value(raw_len, raw_data)-1;
break;
case HID_USAGE_SENSOR_TIME_DAY:
- time_buf->tm_mday = *(u8 *)raw_data;
+ time_buf->tm_mday = (int)hid_time_value(raw_len, raw_data);
break;
case HID_USAGE_SENSOR_TIME_HOUR:
- time_buf->tm_hour = *(u8 *)raw_data;
+ time_buf->tm_hour = (int)hid_time_value(raw_len, raw_data);
break;
case HID_USAGE_SENSOR_TIME_MINUTE:
- time_buf->tm_min = *(u8 *)raw_data;
+ time_buf->tm_min = (int)hid_time_value(raw_len, raw_data);
break;
case HID_USAGE_SENSOR_TIME_SECOND:
- time_buf->tm_sec = *(u8 *)raw_data;
+ time_buf->tm_sec = (int)hid_time_value(raw_len, raw_data);
break;
default:
return -EINVAL;
@@ -153,28 +173,13 @@
"not all needed attributes inside the same report!\n");
return -EINVAL;
}
- if (time_state->info[i].size != 1) {
- /*
- * The draft for HID-sensors (HUTRR39) currently
- * doesn't define the range for the year attribute.
- * Therefor we support both 8 bit (0-99) and 16 bit
- * (full) as size for the year.
- */
- if (time_state->info[i].attrib_id !=
- HID_USAGE_SENSOR_TIME_YEAR) {
- dev_err(&pdev->dev,
- "attribute '%s' not 8 bits wide!\n",
+ if (time_state->info[i].size == 3 ||
+ time_state->info[i].size > 4) {
+ dev_err(&pdev->dev,
+ "attribute '%s' not 8, 16 or 32 bits wide!\n",
hid_time_attrib_name(
time_state->info[i].attrib_id));
- return -EINVAL;
- }
- if (time_state->info[i].size != 2) {
- dev_err(&pdev->dev,
- "attribute '%s' not 8 or 16 bits wide!\n",
- hid_time_attrib_name(
- time_state->info[i].attrib_id));
- return -EINVAL;
- }
+ return -EINVAL;
}
if (time_state->info[i].units !=
HID_USAGE_SENSOR_UNITS_NOT_SPECIFIED &&