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usb: ep0: complete the pending control request before soft-disconnect

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We abort the control request enqueue during a device initiated disconnect
as soon as the softconnect flag gets cleared. Whenever there is a race
between a control request and soft disconnect, the pending control
request is aborted before dwc3_gadget_pullup() function tries to
complete it. As a result the subsequent soft reconnect fails resulting
in usb connection loss. Avoid this by deciding the enqueue() operation
based on pullups_connected flag which gets cleared after completing the
pending request and putting the core in setup phase.

Change-Id: Ie21ecead7ed73569a426cd8bac586a5576c72993
Signed-off-by: Elson Roy Serrao <eserrao@codeaurora.org>
This commit is contained in:
Elson Roy Serrao 2020-01-20 09:10:25 -08:00 • committed by Gerrit - the friendly Code Review server
commit 4b4b6715b7
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/dwc3/ep0.c
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@ -197,7 +197,7 @@ int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
int ret;
spin_lock_irqsave(&dwc->lock, flags);
if (!dep->endpoint.desc || !dwc->softconnect ||
if (!dep->endpoint.desc || !dwc->pullups_connected ||
!dwc->vbus_active) {
dev_err(dwc->dev, "%s: can't queue to disabled endpoint\n",
dep->name);