linux-kernel - Re: [PATCH] dmaengine: ti: omap-dma: Configure LCH

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Message-ID: <20181124190648.GB3416@darkstar.musicnaut.iki.fi>
Date:   Sat, 24 Nov 2018 21:06:48 +0200
From:   Aaro Koskinen <aaro.koskinen@....fi>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     Greg KH <greg@...ah.com>, Peter Ujfalusi <peter.ujfalusi@...com>,
        vkoul@...nel.org, dan.j.williams@...el.com,
        dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        tony@...mide.com, linux-omap@...r.kernel.org,
        Felipe Balbi <felipe.balbi@...ux.intel.com>
Subject: Re: [PATCH] dmaengine: ti: omap-dma: Configure LCH_TYPE for OMAP1

Hello,

On Sat, Nov 24, 2018 at 05:48:23PM +0000, Russell King - ARM Linux wrote:
> Hmm, there's more questionable stuff in this driver, and the gadget
> layer.

[...]

> So, whatever way I look at this, the code in the removal path both
> in omap_udc and the gadget removal code higher up looks very wrong
> and broken to me.

Yes, week ago I saw omap_udc crashing on both probe failure and
module removal and sent some fixes for the most obvious failures (see
https://marc.info/?l=linux-usb&m=154258778316932&w=2).

Is there any good driver that uses usb_add_gadget_udc_release() correctly?
Looking at fsl_qe_udc.c and fsl_udc_core.c they should also crash if
usb_add_gadget_udc_release() fails.

A.