linux-kernel - Re: [PATCH] usb: dwc3: gadget: Avoid duplicate requests to enable Run/Stop

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Message-ID: <YuALjN8o/XNS7RE2@kroah.com>
Date:   Tue, 26 Jul 2022 17:43:08 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Wesley Cheng <quic_wcheng@...cinc.com>
Cc:     balbi@...nel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, quic_jackp@...cinc.com,
        quic_mrana@...cinc.com, Thinh.Nguyen@...opsys.com
Subject: Re: [PATCH] usb: dwc3: gadget: Avoid duplicate requests to enable
 Run/Stop

On Mon, Jul 25, 2022 at 01:11:36PM -0700, Wesley Cheng wrote:
> Relocate the pullups_connected check until after it is ensured that there
> are no runtime PM transitions.  If another context triggered the DWC3
> core's runtime resume, it may have already enabled the Run/Stop.  Do not
> re-run the entire pullup sequence again, as it may issue a core soft
> reset while Run/Stop is already set.
> 
> Signed-off-by: Wesley Cheng <quic_wcheng@...cinc.com>

What commit does this fix?

How far back should it go to stable kernels?

thanks,

greg k-h