Everything that uses the mapped buffer should be agnostic to is_iomem.
The only reason for the is_iomem test is that we're setting shmem->vaddr
to the returned map->vaddr. Now that the shmem->vaddr code is gone, remove
the obsoleted is_iomem test to clean up the code.

Acked-by: Maxime Ripard <mrip...@kernel.org>
Suggested-by: Thomas Zimmermann <tzimmerm...@suse.de>
Reviewed-by: Boris Brezillon <boris.brezil...@collabora.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipe...@collabora.com>
---
 drivers/gpu/drm/drm_gem_shmem_helper.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c 
b/drivers/gpu/drm/drm_gem_shmem_helper.c
index 043e8e3b129c..1f0a66386415 100644
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -315,12 +315,6 @@ int drm_gem_shmem_vmap_locked(struct drm_gem_shmem_object 
*shmem,
 
        if (obj->import_attach) {
                ret = dma_buf_vmap(obj->import_attach->dmabuf, map);
-               if (!ret) {
-                       if (drm_WARN_ON(obj->dev, map->is_iomem)) {
-                               dma_buf_vunmap(obj->import_attach->dmabuf, map);
-                               return -EIO;
-                       }
-               }
        } else {
                pgprot_t prot = PAGE_KERNEL;
 
-- 
2.43.0

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