[Linux-stm32] [PATCH 1/1] usb: dwc2: gadget: don't try to disable ep0 in dwc2_hsotg_suspend

[Amelie DELAUNAY]

Hi Greg,

Kind reminder about this patch.

Thanks,
Amelie

On 12/16/21 11:20 AM, Minas Harutyunyan wrote:
> On 12/7/2021 5:01 PM, Amelie Delaunay wrote:
>> Calling dwc2_hsotg_ep_disable on ep0 (in/out) will lead to the following
>> logs before returning -EINVAL:
>> dwc2 49000000.usb-otg: dwc2_hsotg_ep_disable: called for ep0
>> dwc2 49000000.usb-otg: dwc2_hsotg_ep_disable: called for ep0
>>
>> To avoid these two logs while suspending, start disabling the endpoint
>> from the index 1, as done in dwc2_hsotg_udc_stop:
>>
>> 	/* all endpoints should be shutdown */
>> 	for (ep = 1; ep < hsotg->num_of_eps; ep++) {
>> 		if (hsotg->eps_in[ep])
>> 			dwc2_hsotg_ep_disable_lock(&hsotg->eps_in[ep]->ep);
>> 		if (hsotg->eps_out[ep])
>> 			dwc2_hsotg_ep_disable_lock(&hsotg->eps_out[ep]->ep);
>> 	}
>>
>> Signed-off-by: Amelie Delaunay <amelie.delaunay at foss.st.com>
> 
> Acked-by: Minas Harutyunyan <Minas.Harutyunyan at synopsys.com>
> 
>> ---
>>    drivers/usb/dwc2/gadget.c | 2 +-
>>    1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
>> index b884a83b26a6..ee31f9a328da 100644
>> --- a/drivers/usb/dwc2/gadget.c
>> +++ b/drivers/usb/dwc2/gadget.c
>> @@ -5086,7 +5086,7 @@ int dwc2_hsotg_suspend(struct dwc2_hsotg *hsotg)
>>    		hsotg->gadget.speed = USB_SPEED_UNKNOWN;
>>    		spin_unlock_irqrestore(&hsotg->lock, flags);
>>    
>> -		for (ep = 0; ep < hsotg->num_of_eps; ep++) {
>> +		for (ep = 1; ep < hsotg->num_of_eps; ep++) {
>>    			if (hsotg->eps_in[ep])
>>    				dwc2_hsotg_ep_disable_lock(&hsotg->eps_in[ep]->ep);
>>    			if (hsotg->eps_out[ep])
>