iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

usb: dwc2: gadget: move gadget resume after the core is in L0 state

Browse Source 
[ 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@synopsys.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Fabrice Gasnier 2020-04-23 13:55:53 +02:00 committed by Greg Kroah-Hartman
parent f1b9e29983
commit 0a560f102d
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/usb/dwc2/core_intr.c
View File

@ -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;