Re: [PATCH v1] gpu: host1x: Fix dma_free_wc() argument in the error path

[Thierry Reding]

On Mon, Apr 23, 2018 at 12:54:56PM +0300, Dmitry Osipenko wrote:
> If IOVA allocation or IOMMU mapping fails, dma_free_wc() is invoked with
> size=0 because of a typo, that triggers "kernel BUG at mm/vmalloc.c:124!".
> 
> Signed-off-by: Dmitry Osipenko 
> ---
>  drivers/gpu/host1x/cdma.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Applied, thanks.

Thierry


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[PATCH v1] gpu: host1x: Fix dma_free_wc() argument in the error path

[Dmitry Osipenko]

If IOVA allocation or IOMMU mapping fails, dma_free_wc() is invoked with
size=0 because of a typo, that triggers "kernel BUG at mm/vmalloc.c:124!".

Signed-off-by: Dmitry Osipenko 
---
 drivers/gpu/host1x/cdma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/host1x/cdma.c b/drivers/gpu/host1x/cdma.c
index 93df28228721..0724122afeac 100644
--- a/drivers/gpu/host1x/cdma.c
+++ b/drivers/gpu/host1x/cdma.c
@@ -127,7 +127,7 @@ static int host1x_pushbuffer_init(struct push_buffer *pb)
 iommu_free_iova:
__free_iova(>iova, alloc);
 iommu_free_mem:
-   dma_free_wc(host1x->dev, pb->alloc_size, pb->mapped, pb->phys);
+   dma_free_wc(host1x->dev, size, pb->mapped, pb->phys);
 
return err;
 }
-- 
2.17.0

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Re: [PATCH v1] gpu: host1x: Fix dma_free_wc() argument in the error path

[Mikko Perttunen]

Reviewed-by: Mikko Perttunen 

On 23.04.2018 12:54, Dmitry Osipenko wrote:

If IOVA allocation or IOMMU mapping fails, dma_free_wc() is invoked with
size=0 because of a typo, that triggers "kernel BUG at mm/vmalloc.c:124!".

Signed-off-by: Dmitry Osipenko 
---
 drivers/gpu/host1x/cdma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/host1x/cdma.c b/drivers/gpu/host1x/cdma.c
index 93df28228721..0724122afeac 100644
--- a/drivers/gpu/host1x/cdma.c
+++ b/drivers/gpu/host1x/cdma.c
@@ -127,7 +127,7 @@ static int host1x_pushbuffer_init(struct push_buffer *pb)
 iommu_free_iova:
__free_iova(>iova, alloc);
 iommu_free_mem:
-   dma_free_wc(host1x->dev, pb->alloc_size, pb->mapped, pb->phys);
+   dma_free_wc(host1x->dev, size, pb->mapped, pb->phys);

return err;
 }


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