drm/tegra: gem: Use dma_mmap_writecombine()
Use the existing API rather than open-coding equivalent functionality
in the driver.
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index a42d4c9..9905598 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -306,6 +306,7 @@
int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma)
{
+ unsigned long vm_pgoff = vma->vm_pgoff;
struct drm_gem_object *gem;
struct tegra_bo *bo;
int ret;
@@ -317,12 +318,19 @@
gem = vma->vm_private_data;
bo = to_tegra_bo(gem);
- ret = remap_pfn_range(vma, vma->vm_start, bo->paddr >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start, vma->vm_page_prot);
- if (ret)
- drm_gem_vm_close(vma);
+ vma->vm_flags &= ~VM_PFNMAP;
+ vma->vm_pgoff = 0;
- return ret;
+ ret = dma_mmap_writecombine(gem->dev->dev, vma, bo->vaddr, bo->paddr,
+ gem->size);
+ if (ret) {
+ drm_gem_vm_close(vma);
+ return ret;
+ }
+
+ vma->vm_pgoff = vm_pgoff;
+
+ return 0;
}
static struct sg_table *