Use dma_mmap_from_coherent() to fix broken mapping of the coherent buffers
to userspace.
Reported-by: Subash Patel <subashrp@xxxxxxxxx>
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
---
arch/arm/mm/dma-mapping.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 6c24218..0cee054 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -511,6 +511,9 @@ int arm_dma_mmap(struct device *dev, struct vm_area_struct *vma,
pgprot_writecombine(vma->vm_page_prot) :
pgprot_dmacoherent(vma->vm_page_prot);
+ if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &ret))
+ return ret;
+
c = arm_vmregion_find(&consistent_head, (unsigned long)cpu_addr);
if (c) {
unsigned long off = vma->vm_pgoff;
--
1.7.1.569.g6f426
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