Re: [PATCH] usb: chipidea: Fix ULPI on imx51

[Fabio Estevam]

Hi Andrey,

On Wed, May 30, 2018 at 2:34 PM, Andrey Smirnov
<andrew.smirnov@xxxxxxxxx> wrote:
> Workaround introduced for i.MX53 in be9cae2479f48 ("usb: chipidea:
> imx: Fix ULPI on imx53") seems to be applicable in case of i.MX51 as
> well. Running latest kernel on ZII RDU1 Board (imx51-zii-rdu1.dts)
> exhibits a kernel frozen on PORTSC access and applying the workaround
> resolves the issue.
>
> Cc: Peter Chen <peter.chen@xxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: Nikita Yushchenko <nikita.yoush@xxxxxxxxxxxxxxxxxx>
> Cc: Fabio Estevam <fabio.estevam@xxxxxxx>
> Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> Cc: Chris Healy <cphealy@xxxxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: linux-usb@xxxxxxxxxxxxxxx
> Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>

This patches causes a regression on a imx51-babbage running 4.18-rc1:
I get a kernel hang.

If I revert it on top of 4.18-rc1, then it boots fine and USB host is
functional.

I understand this patch fixes a kernel hang for you, so which commit
is responsible for the hang you observe?

It seems this commit fixes a hang for you and causes another hang for me :-)

Any ideas?

Thanks