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From 6c10d1142ad073622d338f20aa2e44b2d41927ce Mon Sep 17 00:00:00 2001
From: Jonathan Bell <jonathan@raspberrypi.org>
Date: Wed, 7 Oct 2020 15:09:29 +0100
Subject: [PATCH] dwc_otg: initialise sched_frame for periodic QHs that
were parked
If a periodic QH has no remaining QTDs, then it is removed from all
periodic schedules. When re-adding, initialise the sched_frame and
start_split_frame from the current value of the frame counter.
See https://bugs.launchpad.net/raspbian/+bug/1819560
and
https://github.com/raspberrypi/linux/issues/3883
Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
---
drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
+++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
@@ -689,7 +689,11 @@ int dwc_otg_hcd_qh_add(dwc_otg_hcd_t * h
&qh->qh_list_entry);
//hcd->fiq_state->kick_np_queues = 1;
} else {
+ /* If the QH wasn't in a schedule, then sched_frame is stale. */
+ qh->sched_frame = dwc_frame_num_inc(dwc_otg_hcd_get_frame_number(hcd),
+ SCHEDULE_SLOP);
status = schedule_periodic(hcd, qh);
+ qh->start_split_frame = qh->sched_frame;
if ( !hcd->periodic_qh_count ) {
intr_mask.b.sofintr = 1;
if (fiq_enable) {
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