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Date: Wed, 17 Jun 2020 21:15:03 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Fabrice Gasnier <fabrice.gasnier@...com>, Minas Harutyunyan <hminas@...opsys.com>, Felipe Balbi <balbi@...nel.org>, Sasha Levin <sashal@...nel.org>, linux-usb@...r.kernel.org Subject: [PATCH AUTOSEL 5.4 178/266] usb: dwc2: gadget: move gadget resume after the core is in L0 state From: Fabrice Gasnier <fabrice.gasnier@...com> [ Upstream commit 8c935deacebb8fac8f41378701eb79d12f3c2e2d ] When the remote wakeup interrupt is triggered, lx_state is resumed from L2 to L0 state. But when the gadget resume is called, lx_state is still L2. This prevents the resume callback to queue any request. Any attempt to queue a request from resume callback will result in: - "submit request only in active state" debug message to be issued - dwc2_hsotg_ep_queue() returns -EAGAIN Call the gadget resume routine after the core is in L0 state. Fixes: f81f46e1f530 ("usb: dwc2: implement hibernation during bus suspend/resume") Acked-by: Minas Harutyunyan <hminas@...opsys.com> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@...com> Signed-off-by: Felipe Balbi <balbi@...nel.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/usb/dwc2/core_intr.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c index 6af6add3d4c0..6272b4ae4740 100644 --- a/drivers/usb/dwc2/core_intr.c +++ b/drivers/usb/dwc2/core_intr.c @@ -421,10 +421,13 @@ static void dwc2_handle_wakeup_detected_intr(struct dwc2_hsotg *hsotg) if (ret && (ret != -ENOTSUPP)) dev_err(hsotg->dev, "exit power_down failed\n"); + /* Change to L0 state */ + hsotg->lx_state = DWC2_L0; call_gadget(hsotg, resume); + } else { + /* Change to L0 state */ + hsotg->lx_state = DWC2_L0; } - /* Change to L0 state */ - hsotg->lx_state = DWC2_L0; } else { if (hsotg->params.power_down) return; -- 2.25.1
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