linux-kernel - Re: [PATCH] usb: musb: ux500: set dma config for both src and dst

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Message-ID: <20110803135650.GQ11080@legolas.emea.dhcp.ti.com>
Date:	Wed, 3 Aug 2011 16:56:51 +0300
From:	Felipe Balbi <balbi@...com>
To:	Per Forlin <per.forlin@...aro.org>
Cc:	balbi@...com, Per Forlin <per.forlin@...ricsson.com>,
	Mian Yousaf KAUKAB <mian.yousaf.kaukab@...ricsson.com>,
	Greg Kroah-Hartman <gregkh@...e.de>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org,
	users@...oocommunity.org
Subject: Re: [PATCH] usb: musb: ux500: set dma config for both src and dst

On Wed, Aug 03, 2011 at 03:53:10PM +0200, Per Forlin wrote:
> On 3 August 2011 15:31, Felipe Balbi <balbi@...com> wrote:
> > On Tue, Aug 02, 2011 at 05:33:39PM +0200, Per Forlin wrote:
> >> From: Per Forlin <per.forlin@...aro.org>
> >>
> >> The dma driver requires both src and dst to be set.
> >> This fix is needed in order to run gadget mass storage.
> >> Patch is verified on snowball.
> >>
> >> Signed-off-by: Per Forlin <per.forlin@...aro.org>
> >
> > should this go for stable too ??
> >
> Short answer no.
> 
> Reason:
> I ran into this bug when applying upcoming dma driver patches. Adding
> this patch now will makes sure the musb driver works when the dma
> driver is updated..
> Up until now the dma driver only use the peripheral end point
> configuration and set it for both src and dst. Upcoming patches (not
> sure if they are submitted yet) will allow src and dst to be different
> therefore the client must set both.

ok, good ;-)

-- 
balbi

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