[PATCH] imx: dma: remove SDMA_IS_MERGED

[Sascha Hauer]

On Thu, Nov 25, 2010 at 10:09:58AM -0200, Fabio Estevam wrote:
> Hi Sascha,
> 
> On Thu, Nov 25, 2010 at 7:13 AM, Sascha Hauer <s.hauer at pengutronix.de> wrote:
> > On Wed, Nov 24, 2010 at 07:42:31PM -0200, Fabio Estevam wrote:
> >> Hi Uwe,
> >>
> >> 2010/11/24 Uwe Kleine-König <u.kleine-koenig at pengutronix.de>:
> >> ....
> >> > I usually prefer just using DEBUG_LL and put
> >> >
> >> >        #ifdef CONFIG_DEBUG_LL
> >> >                void printch(char);
> >> >                printch(c);
> >> >        #endif
> >> >
> >> > into emit_log_char.  But I think that's only because I don't know how to
> >> > use early printk properly.  (You might need an additional kernel
> >> > parameter?!)
> >>
> >> Thanks. I see that the kernel crashes at sdma_get_firmware.
> >
> > This is a bug which should be fixed in this -rc cycle. Anyway, note
> > that I have a patch in my for-2.6.38 queue which makes the SDMA work
> > without a valid firmware. In this case only the scripts in ROM are used.
> 
> Yes, I am using your for-next branch, which contains the patch to make
> SDMA work without a valid firmware.
> 
> I also generated the SDMA firmware (sdma-imx51-to1.bin) via your sdma
> tool and placed it under /lib/firmware, but the result is the same
> with or without a valid firmware: when request_firmware is called the
> following crash happens:

I tried to reproduce this today. Instead of crashing my kernel simply
hangs. This seems to be because request_firmware waits till the firmware
appears which never happens. I remember a crash like this though, I
think it has something to do with the firmware related kconfig options.
I hope to find a time slot later this week to track this down.

Sascha

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