Re: [PATCH 2/2] scsi: ufs: Stop clearing unit attentions

[Bart Van Assche]

On 9/30/21 9:58 PM, Adrian Hunter wrote:
> On 30/09/2021 22:52, Jaegeuk Kim wrote:
> > From: Bart Van Assche <bvanassche@xxxxxxxxxx>
> >
> > Commit aa53f580e67b ("scsi: ufs: Minor adjustments to error handling")
> > introduced a ufshcd_clear_ua_wluns() call in
> > ufshcd_err_handling_unprepare(). As explained in detail by Adrian Hunter,
> > this can trigger a deadlock. Avoid that deadlock by removing the code that
> > clears the unit attention. This is safe because the only software that
> > relies on clearing unit attentions is the Android Trusty software and
>
> Did you test this?

This patch series has been tested on an Android phone running the latest Trusty
software but with runtime power management disabled.

Bart.