[PATCH 1/2] drm/ttm: use the same attributes when freeing d_page->vaddr

[PATCH 1/2] drm/ttm: use the same attributes when freeing d_page->vaddr

[Fuqian Huang]

In function __ttm_dma_alloc_page(), d_page->addr is allocated
by dma_alloc_attrs() but freed with use dma_free_coherent() in
__ttm_dma_free_page().
Use the correct dma_free_attrs() to free d_page->vaddr.

Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
---
 drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
index d594f7520b7b..7d78e6deac89 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
@@ -285,9 +285,13 @@ static int ttm_set_pages_caching(struct dma_pool *pool,
 
 static void __ttm_dma_free_page(struct dma_pool *pool, struct dma_page *d_page)
 {
+	unsigned long attrs = 0;
 	dma_addr_t dma = d_page->dma;
 	d_page->vaddr &= ~VADDR_FLAG_HUGE_POOL;
-	dma_free_coherent(pool->dev, pool->size, (void *)d_page->vaddr, dma);
+	if (pool->type & IS_HUGE)
+		attrs = DMA_ATTR_NO_WARN;
+
+	dma_free_attrs(pool->dev, pool->size, (void *)d_page->vaddr, dma, attrs);
 
 	kfree(d_page);
 	d_page = NULL;
-- 
2.11.0

Re: [PATCH 1/2] drm/ttm: use the same attributes when freeing d_page->vaddr

[Koenig, Christian]

Am 11.07.19 um 05:10 schrieb Fuqian Huang:
> In function __ttm_dma_alloc_page(), d_page->addr is allocated
> by dma_alloc_attrs() but freed with use dma_free_coherent() in
> __ttm_dma_free_page().
> Use the correct dma_free_attrs() to free d_page->vaddr.
>
> Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>

Reviewed-by: Christian König <christian.koenig@amd.com>

How do you want to upstream that? Should I pull it into our tree?

Thanks,
Christian.

> ---
>   drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 6 +++++-
>   1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> index d594f7520b7b..7d78e6deac89 100644
> --- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> +++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> @@ -285,9 +285,13 @@ static int ttm_set_pages_caching(struct dma_pool *pool,
>   
>   static void __ttm_dma_free_page(struct dma_pool *pool, struct dma_page *d_page)
>   {
> +	unsigned long attrs = 0;
>   	dma_addr_t dma = d_page->dma;
>   	d_page->vaddr &= ~VADDR_FLAG_HUGE_POOL;
> -	dma_free_coherent(pool->dev, pool->size, (void *)d_page->vaddr, dma);
> +	if (pool->type & IS_HUGE)
> +		attrs = DMA_ATTR_NO_WARN;
> +
> +	dma_free_attrs(pool->dev, pool->size, (void *)d_page->vaddr, dma, attrs);
>   
>   	kfree(d_page);
>   	d_page = NULL;

Re: [PATCH 1/2] drm/ttm: use the same attributes when freeing d_page->vaddr

[Fuqian Huang]

Koenig, Christian <Christian.Koenig@amd.com> 於 2019年7月16日週二 下午9:38寫道：
>
> Am 11.07.19 um 05:10 schrieb Fuqian Huang:
> > In function __ttm_dma_alloc_page(), d_page->addr is allocated
> > by dma_alloc_attrs() but freed with use dma_free_coherent() in
> > __ttm_dma_free_page().
> > Use the correct dma_free_attrs() to free d_page->vaddr.
> >
> > Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
>
> Reviewed-by: Christian König <christian.koenig@amd.com>
>
> How do you want to upstream that? Should I pull it into our tree?

I just came across this misuse case accidentally.
I am not very clear about 'How to upstream that'.
Are there more than one way to upstream the code and fix the problem?

>From my side, it is ok that you pull it into your tree and fix it or
fix it in other way.
:) It will be fine if the problem is fixed.

Thanks.

>
> Thanks,
> Christian.
>
> > ---
> >   drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 6 +++++-
> >   1 file changed, 5 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> > index d594f7520b7b..7d78e6deac89 100644
> > --- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> > +++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
> > @@ -285,9 +285,13 @@ static int ttm_set_pages_caching(struct dma_pool *pool,
> >
> >   static void __ttm_dma_free_page(struct dma_pool *pool, struct dma_page *d_page)
> >   {
> > +     unsigned long attrs = 0;
> >       dma_addr_t dma = d_page->dma;
> >       d_page->vaddr &= ~VADDR_FLAG_HUGE_POOL;
> > -     dma_free_coherent(pool->dev, pool->size, (void *)d_page->vaddr, dma);
> > +     if (pool->type & IS_HUGE)
> > +             attrs = DMA_ATTR_NO_WARN;
> > +
> > +     dma_free_attrs(pool->dev, pool->size, (void *)d_page->vaddr, dma, attrs);
> >
> >       kfree(d_page);
> >       d_page = NULL;
>

Re: [PATCH 1/2] drm/ttm: use the same attributes when freeing d_page->vaddr

[Koenig, Christian]

Am 18.07.19 um 09:21 schrieb Fuqian Huang:
> Koenig, Christian <Christian.Koenig@amd.com> 於 2019年7月16日週二 下午9:38寫道：
>> Am 11.07.19 um 05:10 schrieb Fuqian Huang:
>>> In function __ttm_dma_alloc_page(), d_page->addr is allocated
>>> by dma_alloc_attrs() but freed with use dma_free_coherent() in
>>> __ttm_dma_free_page().
>>> Use the correct dma_free_attrs() to free d_page->vaddr.
>>>
>>> Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
>> Reviewed-by: Christian König <christian.koenig@amd.com>
>>
>> How do you want to upstream that? Should I pull it into our tree?
> I just came across this misuse case accidentally.
> I am not very clear about 'How to upstream that'.
> Are there more than one way to upstream the code and fix the problem?

Well I can add it to the TTM tree which send to David or it could be 
pulled through some other way towards Linus.

>  From my side, it is ok that you pull it into your tree and fix it or
> fix it in other way.
> :) It will be fine if the problem is fixed.

Ok, fine with me :)

Christian.

>
> Thanks.
>
>> Thanks,
>> Christian.
>>
>>> ---
>>>    drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 6 +++++-
>>>    1 file changed, 5 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
>>> index d594f7520b7b..7d78e6deac89 100644
>>> --- a/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
>>> +++ b/drivers/gpu/drm/ttm/ttm_page_alloc_dma.c
>>> @@ -285,9 +285,13 @@ static int ttm_set_pages_caching(struct dma_pool *pool,
>>>
>>>    static void __ttm_dma_free_page(struct dma_pool *pool, struct dma_page *d_page)
>>>    {
>>> +     unsigned long attrs = 0;
>>>        dma_addr_t dma = d_page->dma;
>>>        d_page->vaddr &= ~VADDR_FLAG_HUGE_POOL;
>>> -     dma_free_coherent(pool->dev, pool->size, (void *)d_page->vaddr, dma);
>>> +     if (pool->type & IS_HUGE)
>>> +             attrs = DMA_ATTR_NO_WARN;
>>> +
>>> +     dma_free_attrs(pool->dev, pool->size, (void *)d_page->vaddr, dma, attrs);
>>>
>>>        kfree(d_page);
>>>        d_page = NULL;