linux-kernel - Re: [PATCH v7 05/10] usb: dwc3: make controller clear transfer resources after complete

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Message-ID: <878t142vpq.fsf@linux.intel.com>
Date:   Wed, 05 Dec 2018 11:01:37 +0200
From:   Felipe Balbi <balbi@...nel.org>
To:     Anurag Kumar Vulisha <anurag.kumar.vulisha@...inx.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Shuah Khan <shuah@...nel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Johan Hovold <johan@...nel.org>,
        Jaejoong Kim <climbbb.kim@...il.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Roger Quadros <rogerq@...com>,
        Manu Gautam <mgautam@...eaurora.org>,
        martin.petersen@...cle.com, Bart Van Assche <bvanassche@....org>,
        Mike Christie <mchristi@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        Colin Ian King <colin.king@...onical.com>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        v.anuragkumar@...il.com, Thinh Nguyen <thinhn@...opsys.com>,
        Tejas Joglekar <tejas.joglekar@...opsys.com>,
        Ajay Yugalkishore Pandey <APANDEY@...inx.com>,
        Anurag Kumar Vulisha <anurag.kumar.vulisha@...inx.com>
Subject: Re: [PATCH v7 05/10] usb: dwc3: make controller clear transfer resources after complete


Hi,

Anurag Kumar Vulisha <anurag.kumar.vulisha@...inx.com> writes:
> @@ -2487,6 +2497,11 @@ static void dwc3_endpoint_interrupt(struct dwc3 *dwc,
>  	}
>  
>  	switch (event->endpoint_event) {
> +	case DWC3_DEPEVT_XFERCOMPLETE:
> +		if (!dep->stream_capable)
> +			break;
> +		dep->flags &= ~DWC3_EP_TRANSFER_STARTED;
> +		/* Fall Through */

instead, let's add a proper handler for this:

dwc3_gadget_endpoint_transfer_complete(dep, event);

That handler should be "self-sufficient". IOW, we shouldn't have this
fall through here. This means that the other patch where you modify
dwc3_gadget_transfer_in_progress() shouldn't be necessary, since that
event shouldn't run for stream capable endpoints.

While rewriting the patches, please rebase on my testing/next as I have
applied a few of the patches in this series.

-- 
balbi

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