linux-kernel - Re: [PATCH v2] usb: dwc3: gadget: Update chain bit correctly when using sg list

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Date:   Mon, 24 Feb 2020 16:14:07 -0800
From:   John Stultz <john.stultz@...aro.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     Pratham Pratap <prathampratap@...eaurora.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Felipe Balbi <balbi@...nel.org>, Yang Fei <fei.yang@...el.com>,
        Thinh Nguyen <thinhn@...opsys.com>,
        Tejas Joglekar <tejas.joglekar@...opsys.com>,
        Andrzej Pietrasiewicz <andrzej.p@...labora.com>,
        Jack Pham <jackp@...eaurora.org>, Todd Kjos <tkjos@...gle.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Linux USB List <linux-usb@...r.kernel.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH v2] usb: dwc3: gadget: Update chain bit correctly when
 using sg list

On Thu, Feb 20, 2020 at 4:49 AM Sasha Levin <sashal@...nel.org> wrote:
>
> Hi,
>
> [This is an automated email]
>
> This commit has been processed because it contains a -stable tag.
> The stable tag indicates that it's relevant for the following trees: all
>
> The bot has tested the following trees: v5.5.4, v5.4.20, v4.19.104, v4.14.171, v4.9.214, v4.4.214.
>
> v5.5.4: Build OK!
> v5.4.20: Build OK!
> v4.19.104: Build OK!
> v4.14.171: Build failed! Errors:
>     drivers/usb/dwc3/gadget.c:1098:12: error: `remaining` undeclared (first use in this function)
>
> v4.9.214: Failed to apply! Possible dependencies:
>     Unable to calculate
>
> v4.4.214: Failed to apply! Possible dependencies:
>     36b68aae8e39 ("usb: dwc3: gadget: use link TRB for all endpoint types")
>     4faf75504a7d ("usb: dwc3: gadget: move % operation to increment helpers")
>     53fd88189e08 ("usb: dwc3: gadget: rename busy/free_slot to trb_enqueue/dequeue")
>     5ee85d890f8d ("usb: dwc3: gadget: split __dwc3_gadget_kick_transfer()")
>     70fdb273db37 ("usb: dwc3: get rid of DWC3_TRB_MASK")
>     8495036e986b ("usb: dwc3: increase maximum number of TRBs per endpoint")
>     c4233573f6ee ("usb: dwc3: gadget: prepare TRBs on update transfers too")
>     e901aa159dac ("usb: dwc3: gadget: fix endpoint renaming")
>     ef966b9d3353 ("usb: dwc3: gadget: add trb enqueue/dequeue helpers")
>
>
> NOTE: The patch will not be queued to stable trees until it is upstream.
>
> How should we proceed with this patch?

Sorry, I only see this change as critical for 4.20+ kernels (where it
started biting folks), but I'd defer to Felipe if he'd like to see it
go any further back.

thanks
-john