drm/i915: use IOMEM_ERR_PTR() directly

Use IOMEM_ERR_PTR() instead of self defined IO_ERR_PTR().
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220503144937.679424-1-tvrtko.ursulin@linux.intel.com

drivers/gpu/drm/i915/i915_vma.c

@@ -548,7 +548,7 @@ void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)
 	int err;
 
 	if (WARN_ON_ONCE(vma->obj->flags & I915_BO_ALLOC_GPU_ONLY))
-		return IO_ERR_PTR(-EINVAL);
+		return IOMEM_ERR_PTR(-EINVAL);
 
 	if (!i915_gem_object_is_lmem(vma->obj)) {
 		if (GEM_WARN_ON(!i915_vma_is_map_and_fenceable(vma))) {
@@ -601,7 +601,7 @@ void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)
 err_unpin:
 	__i915_vma_unpin(vma);
 err:
-	return IO_ERR_PTR(err);
+	return IOMEM_ERR_PTR(err);
 }
 
 void i915_vma_flush_writes(struct i915_vma *vma)

drivers/gpu/drm/i915/i915_vma.h

@@ -317,7 +317,6 @@ static inline bool i915_node_color_differs(const struct drm_mm_node *node,
  * Returns a valid iomapped pointer or ERR_PTR.
  */
 void __iomem *i915_vma_pin_iomap(struct i915_vma *vma);
-#define IO_ERR_PTR(x) ((void __iomem *)ERR_PTR(x))
 
 /**
  * i915_vma_unpin_iomap - unpins the mapping returned from i915_vma_iomap