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Subject: Re: [PATCH v2] usb: fsl_udc: errata - postpone freeing current dTD
From: Christoph Fritz <chf.fritz@googlemail.com>
To: Fabio Estevam <festevam@gmail.com>
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Date: Tue, 12 Jun 2012 21:40:31 +0200
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Cc: Ben Dooks <ben-linux@fluff.org>, Chen Peter-B29397 <B29397@freescale.com>,
 Nicolas Ferre <nicolas.ferre@atmel.com>, "Hans J.
 Koch" <hjk@hansjkoch.de>, Kukjin Kim <kgene.kim@samsung.com>,
 Russell King <linux@arm.linux.org.uk>,
 Thomas Dahlmann <dahlmann.thomas@arcor.de>,
 Sascha Hauer <s.hauer@pengutronix.de>, Christian Hemp <c.hemp@phytec.de>,
 Haojian Zhuang <haojian.zhuang@gmail.com>, Daniel Mack <daniel@caiaq.de>,
 Neil Zhang <zhangwm@marvell.com>,
 linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
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 Li Yang-R58472 <r58472@freescale.com>,
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
 "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
 Felipe Balbi <balbi@ti.com>, Ido Shayevitz <idos@codeaurora.org>,
 Estevam Fabio-R49496 <r49496@freescale.com>,
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Hi Fabio

On Sun, 2012-06-10 at 15:41 -0300, Fabio Estevam wrote:
> Hi Christoph,
> 
> On Mon, Jun 4, 2012 at 8:37 AM, Christoph Fritz
> <chf.fritz@googlemail.com> wrote:
> 
> > After that, I stumbled upon this dmesg:
> >
> > Freescale High-Speed USB SOC Device Controller driver (Apr 20, 2007)
> > fsl-usb2-udc fsl-usb2-udc: clk_get("usb") failed
> > fsl-usb2-udc: probe of fsl-usb2-udc failed with error -2
> >
> > Sascha, could you give me a hint?
> 
> Does the patch below fix your problem?

Thanks for your patch. It does indeed load
"Freescale High-Speed USB SOC Device Controller driver (Apr 20, 2007)"
fine - but now when I want to use it:

modprobe g_ether
[   17.099363] g_ether gadget: using random self ethernet address
[   17.105316] g_ether gadget: using random host ethernet address
[   17.111974] usb0: MAC 1a:c7:9e:76:cc:45
[   17.115866] usb0: HOST MAC 66:a2:4a:0a:46:17
[   17.120199] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
[   17.126861] g_ether gadget: g_ether ready

these are "the last words": System hangs completely. Same behavior with
g_serial (these two I've tested).

Currently I can't investigate this further, not because of a bug - but a
flu.


Thanks,
 -- Christoph