BUG: sleeping function called from invalid context

[u.kleine-koenig@pengutronix.de (Uwe Kleine-König)]

On Thu, Nov 24, 2011 at 09:01:41AM +0000, Russell King - ARM Linux wrote:
> On Thu, Nov 24, 2011 at 08:14:06AM +0100, Uwe Kleine-K?nig wrote:
> > On Wed, Nov 23, 2011 at 10:51:24PM +0000, Russell King - ARM Linux wrote:
> > > So really, there's no excuse not to fix this for the imx/mxwhatever SoCs
> > > today - the clk framework is totally irrelevant as far as this goes.
> > I think doing the clk_prepare seperation and converting to the clk
> > framework in one step will be easier.
> 
> From a point of view of being able to separate the changes so there isn't
> a flag day, you're wrong.  clk_prepare() is already present in the kernel
> as dummy functions, and all you need to do at this point is arrange for
> the drivers to make the appropriate calls.  There's no need to write one
> line of code behind clk_prepare() at the current time.
Yeah, but adding clk_prepare to the serial driver doesn't help me to get
rid of the BUG reported in this thread without giving it some meaning in
the platform, right?
 
> If you then want to provide a clk_prepare() implementation, then you need
> to select CONFIG_HAVE_CLK_PREPARE to prevent the dummy function being
> used.

Best regards
Uwe

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