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path: root/drivers/hid/hid-lg3ff.c
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Diffstat (limited to 'drivers/hid/hid-lg3ff.c')
-rw-r--r--drivers/hid/hid-lg3ff.c29
1 files changed, 6 insertions, 23 deletions
diff --git a/drivers/hid/hid-lg3ff.c b/drivers/hid/hid-lg3ff.c
index e52f181f6aa1..8c2da183d3bc 100644
--- a/drivers/hid/hid-lg3ff.c
+++ b/drivers/hid/hid-lg3ff.c
@@ -66,10 +66,11 @@ static int hid_lg3ff_play(struct input_dev *dev, void *data,
int x, y;
/*
- * Maxusage should always be 63 (maximum fields)
- * likely a better way to ensure this data is clean
+ * Available values in the field should always be 63, but we only use up to
+ * 35. Instead, clear the entire area, however big it is.
*/
- memset(report->field[0]->value, 0, sizeof(__s32)*report->field[0]->maxusage);
+ memset(report->field[0]->value, 0,
+ sizeof(__s32) * report->field[0]->report_count);
switch (effect->type) {
case FF_CONSTANT:
@@ -129,32 +130,14 @@ static const signed short ff3_joystick_ac[] = {
int lg3ff_init(struct hid_device *hid)
{
struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
- struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct input_dev *dev = hidinput->input;
- struct hid_report *report;
- struct hid_field *field;
const signed short *ff_bits = ff3_joystick_ac;
int error;
int i;
- /* Find the report to use */
- if (list_empty(report_list)) {
- hid_err(hid, "No output report found\n");
- return -1;
- }
-
/* Check that the report looks ok */
- report = list_entry(report_list->next, struct hid_report, list);
- if (!report) {
- hid_err(hid, "NULL output report\n");
- return -1;
- }
-
- field = report->field[0];
- if (!field) {
- hid_err(hid, "NULL field\n");
- return -1;
- }
+ if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 35))
+ return -ENODEV;
/* Assume single fixed device G940 */
for (i = 0; ff_bits[i] >= 0; i++)