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 <stefanberzl@xxxxxxxxx> --- 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, ¶ms->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, ¶ms->frame_list[i], + data, size); + } } return 0; -- 2.43.0