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usb: dwc3: gadget: Synchronize IRQ between soft connect/disconnect

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[ Upstream commit 9711c67de7 ]

Ensure that there are no pending events being handled in between soft
connect/disconnect transitions.  As we are keeping interrupts enabled,
and EP0 events are still being serviced, this avoids any stale events from
being serviced.

Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
Link: https://lore.kernel.org/r/20220817182359.13550-4-quic_wcheng@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: c8540870af ("usb: dwc3: gadget: Improve dwc3_gadget_suspend() and dwc3_gadget_resume()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Wesley Cheng 2022-08-17 11:23:53 -07:00 • committed by Justin Hammond
parent c930251678
commit 71a0b6b972
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/dwc3/gadget.c
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@ -2540,6 +2540,8 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
return 0;
}
synchronize_irq(dwc->irq_gadget);
if (!is_on) {
ret = dwc3_gadget_soft_disconnect(dwc);
} else {