Re: [PATCH master] usb: dwc2: increase timeout for waiting on host mode

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

On 07.05.21 10:07, Sascha Hauer wrote:
> Instead of applying two patches I suggest we go with the following
> oneliner which is fine for master.

I'd have preferred two patches, because then I've more time to
procrastinate before testing the second one. ;)

FTR: I just tested v2021.05.0 and USB now works (tested by DHCP
over the USB-Ethernet controller).

Thanks,
Ahmad

> 
> Sascha
> 
> ------------------------------8<--------------------------------
> 
> From 9fc2b0364c4b686d110b772be2245be3a513407d Mon Sep 17 00:00:00 2001
> From: Sascha Hauer <s.hauer@pengutronix.de>
> Date: Fri, 7 May 2021 09:58:43 +0200
> Subject: [PATCH] usb: dwc2: Fix wait for mode timeout
> 
> The timeout waiting for host mode should be 110ms instead of 110us.
> The timeout is the same as in Linux now and the same it was before
> fdd30cc251. It takes 49ms to go to host mode on the Raspberry Pi 3b,
> so host mode stopped working with 26459ab780 which removed an additional
> 100ms delay before dwc2_wait_for_mode() was actually called.
> 
> Fixes: fdd30cc251 ("usb: dwc2: Rework dwc2_wait_for_mode to use wait_on_timeout")
> Fixes: 26459ab780 ("usb: dwc2: Rework wait for host mode during core reset")
> Reported-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
>  drivers/usb/dwc2/core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
> index 5d04a07b03..8a78d8199e 100644
> --- a/drivers/usb/dwc2/core.c
> +++ b/drivers/usb/dwc2/core.c
> @@ -688,7 +688,7 @@ int dwc2_get_dr_mode(struct dwc2 *dwc2)
>   */
>  void dwc2_wait_for_mode(struct dwc2 *dwc2, bool host_mode)
>  {
> -	unsigned int timeout = 110 * USECOND;
> +	unsigned int timeout = 110 * MSECOND;
>  	int ret;
>  
>  	dev_vdbg(dwc2->dev, "Waiting for %s mode\n",
> 

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