Revert "tegra: host: move stale wait checking into the kernel"

This reverts commit 2d49bf33f3885aab293f12d54447f66e911e3226.

1 files changed, 0 insertions, 50 deletions

diff --git a/drivers/video/tegra/nvmap/nvmap.c b/drivers/video/tegra/nvmap/nvmap.c
index 380f70ec187c..1a70f43d79f5 100644
--- a/drivers/video/tegra/nvmap/nvmap.c
+++ b/drivers/video/tegra/nvmap/nvmap.c
@@ -724,53 +724,3 @@ void nvmap_free(struct nvmap_client *client, struct nvmap_handle_ref *r)
 {
 	nvmap_free_handle_id(client, nvmap_ref_to_id(r));
 }
-
-/*
- * create a mapping to the user's buffer and write it
- * (uses similar logic from nvmap_reloc_pin_array to map the cmdbuf)
- */
-int nvmap_patch_wait(struct nvmap_client *client,
-				struct nvmap_handle *patch,
-				u32 patch_offset, u32 patch_value)
-{
-	unsigned long phys;
-	unsigned int pfn, last_pfn = 0;
-	void *addr;
-	pte_t **pte;
-
-	if (patch_offset >= patch->size) {
-		nvmap_warn(client, "read/write outside of handle\n");
-		return -EFAULT;
-	}
-
-	pte = nvmap_alloc_pte(client->dev, &addr);
-	if (IS_ERR(pte))
-		return PTR_ERR(pte);
-
-	/* derive physaddr of cmdbuf WAIT to patch */
-	if (patch->heap_pgalloc) {
-		unsigned int page = patch_offset >> PAGE_SHIFT;
-		phys = page_to_phys(patch->pgalloc.pages[page]);
-		phys += (patch_offset & ~PAGE_MASK);
-	} else {
-		phys = patch->carveout->base + patch_offset;
-	}
-
-	pfn = __phys_to_pfn(phys);
-
-	/* write PTE, so addr points to cmdbuf PFN */
-	if (pfn != last_pfn) {
-		pgprot_t prot = nvmap_pgprot(patch, pgprot_kernel);
-		unsigned long kaddr = (unsigned long)addr;
-		set_pte_at(&init_mm, kaddr, *pte, pfn_pte(pfn, prot));
-		flush_tlb_kernel_page(kaddr);
-		last_pfn = pfn;
-	}
-
-	/* write patch_value to addr + page offset */
-	__raw_writel(patch_value, addr + (phys & ~PAGE_MASK));
-
-	nvmap_free_pte(client->dev, pte);
-	wmb();
-	return 0;
-}