[patch] drm/ttm: fix condition (and vs or)

[Konrad Rzeszutek Wilk]

On Thu, Dec 08, 2011 at 10:34:00AM -0500, Jerome Glisse wrote:
> On Thu, Dec 08, 2011 at 09:50:54AM +0300, Dan Carpenter wrote:
> > The "if (!p && !p->dev)" condition isn't right because || was intended
> > instead of &&.  But actually, "p" is the list cursor and so it's always

Duh!
> > non-NULL and we can just remove that bit.  We can remove the another
> > similar check as well.
> > 
> > Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
> Reviewed-by: Jerome Glisse <jglisse at redhat.com>

And Acked-by me.

Jerome, since you have the patches (And are thinking to send a GIT PULL
to Dave) in your tree, could you include this patch in your queue?

Or would you prefer I do at some other point of time?

Thanks!
> > 
> > diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> > index 6678abc..1cf4c2c 100644
> > --- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> > +++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> > @@ -930,10 +930,8 @@ static int ttm_dma_pool_get_num_unused_pages(void)
> >  	unsigned total = 0;
> >  
> >  	mutex_lock(&_manager->lock);
> > -	list_for_each_entry(p, &_manager->pools, pools) {
> > -		if (p)
> > -			total += p->pool->npages_free;
> > -	}
> > +	list_for_each_entry(p, &_manager->pools, pools)
> > +		total += p->pool->npages_free;
> >  	mutex_unlock(&_manager->lock);
> >  	return total;
> >  }
> > @@ -1023,7 +1021,7 @@ static int ttm_dma_pool_mm_shrink(struct shrinker *shrink,
> >  	list_for_each_entry(p, &_manager->pools, pools) {
> >  		unsigned nr_free;
> >  
> > -		if (!p && !p->dev)
> > +		if (!p->dev)
> >  			continue;
> >  		if (shrink_pages == 0)
> >  			break;
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