2024-04-18 19:45:55

by Stefan Berzl

Subject: [PATCH v2] HID: uclogic: Remove useless loop

The while in question does nothing except provide the possibility
to have an infinite loop in case the subreport id is actually the same
as the pen id.

Signed-off-by: Stefan Berzl <[email protected]>
---
drivers/hid/hid-uclogic-core.c | 55 ++++++++++++++++------------------
1 file changed, 25 insertions(+), 30 deletions(-)

diff --git a/drivers/hid/hid-uclogic-core.c b/drivers/hid/hid-uclogic-core.c
index ad74cbc9a0aa..8219d3dc9de4 100644
--- a/drivers/hid/hid-uclogic-core.c
+++ b/drivers/hid/hid-uclogic-core.c
@@ -431,40 +431,35 @@ static int uclogic_raw_event(struct hid_device *hdev,
if (uclogic_exec_event_hook(params, data, size))
return 0;

- while (true) {
- /* Tweak pen reports, if necessary */
- if ((report_id == params->pen.id) && (size >= 2)) {
- subreport_list_end =
- params->pen.subreport_list +
- ARRAY_SIZE(params->pen.subreport_list);
- /* Try to match a subreport */
- for (subreport = params->pen.subreport_list;
- subreport < subreport_list_end; subreport++) {
- if (subreport->value != 0 &&
- subreport->value == data[1]) {
- break;
- }
- }
- /* If a subreport matched */
- if (subreport < subreport_list_end) {
- /* Change to subreport ID, and restart */
- report_id = data[0] = subreport->id;
- continue;
- } else {
- return uclogic_raw_event_pen(drvdata, data, size);
+ /* Tweak pen reports, if necessary */
+ if ((report_id == params->pen.id) && (size >= 2)) {
+ subreport_list_end =
+ params->pen.subreport_list +
+ ARRAY_SIZE(params->pen.subreport_list);
+ /* Try to match a subreport */
+ for (subreport = params->pen.subreport_list;
+ subreport < subreport_list_end; subreport++) {
+ if (subreport->value != 0 &&
+ subreport->value == data[1]) {
+ break;
}
}
-
- /* Tweak frame control reports, if necessary */
- for (i = 0; i < ARRAY_SIZE(params->frame_list); i++) {
- if (report_id == params->frame_list[i].id) {
- return uclogic_raw_event_frame(
- drvdata, &params->frame_list[i],
- data, size);
- }
+ /* If a subreport matched */
+ if (subreport < subreport_list_end) {
+ /* Change to the (non-pen) subreport ID and continue */
+ report_id = data[0] = subreport->id;
+ } else {
+ return uclogic_raw_event_pen(drvdata, data, size);
}
+ }

- break;
+ /* Tweak frame control reports, if necessary */
+ for (i = 0; i < ARRAY_SIZE(params->frame_list); i++) {
+ if (report_id == params->frame_list[i].id) {
+ return uclogic_raw_event_frame(
+ drvdata, &params->frame_list[i],
+ data, size);
+ }
}

return 0;
--
2.43.0