From: Fabrice Gasnier <fabrice.gasn...@st.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 <hmi...@synopsys.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasn...@st.com>
Signed-off-by: Felipe Balbi <ba...@kernel.org>
Signed-off-by: Sasha Levin <sas...@kernel.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 6af6add3d4c0b..6272b4ae4740f 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
