[PATCH] of: dma: protect list write operation by spin_lock

[Vinod Koul]

On Mon, Jan 28, 2013 at 09:52:00AM -0600, Rob Herring wrote:
> On 01/28/2013 09:24 AM, Andy Shevchenko wrote:
> > Signed-off-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
> > ---
> >  drivers/of/dma.c |    2 ++
> >  1 file changed, 2 insertions(+)
> 
> You need to cc whomever has this file in their tree which is Vinod.
> 
> Acked-by: Rob Herring <rob.herring at calxeda.com>
> 
> Vinod, it's probably better to move drivers/of/dma.c to drivers/dma.
> That's been the direction we've been taking with new OF binding code. I
> must have missed that in the review.
ok, do you have any patches on your tree for this if not then I can update my tree
for this change and then we can apply changes thru slave-dma tree.

--
~Vinod
> 
> Rob
> 
> > 
> > diff --git a/drivers/of/dma.c b/drivers/of/dma.c
> > index 59631b2..1ae6120 100644
> > --- a/drivers/of/dma.c
> > +++ b/drivers/of/dma.c
> > @@ -117,7 +117,9 @@ int of_dma_controller_register(struct device_node *np,
> >  	ofdma->use_count = 0;
> >  
> >  	/* Now queue of_dma controller structure in list */
> > +	spin_lock(&of_dma_lock);
> >  	list_add_tail(&ofdma->of_dma_controllers, &of_dma_list);
> > +	spin_unlock(&of_dma_lock);
> >  
> >  	return 0;
> >  }
> >