drm/i915: Drop return value from lrc_setup_hardware_status_page

kmap never fails.
Spotted-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Arun Siluvery <arun.siluvery@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>

drivers/gpu/drm/i915/intel_lrc.c

@@ -1706,7 +1706,7 @@ static uint32_t get_lr_context_size(struct intel_engine_cs *ring)
 	return ret;
 }
 
-static int lrc_setup_hardware_status_page(struct intel_engine_cs *ring,
+static void lrc_setup_hardware_status_page(struct intel_engine_cs *ring,
 		struct drm_i915_gem_object *default_ctx_obj)
 {
 	struct drm_i915_private *dev_priv = ring->dev->dev_private;
@@ -1716,15 +1716,11 @@ static int lrc_setup_hardware_status_page(struct intel_engine_cs *ring,
 	ring->status_page.gfx_addr = i915_gem_obj_ggtt_offset(default_ctx_obj);
 	ring->status_page.page_addr =
 			kmap(sg_page(default_ctx_obj->pages->sgl));
-	if (ring->status_page.page_addr == NULL)
-		return -ENOMEM;
 	ring->status_page.obj = default_ctx_obj;
 
 	I915_WRITE(RING_HWS_PGA(ring->mmio_base),
 			(u32)ring->status_page.gfx_addr);
 	POSTING_READ(RING_HWS_PGA(ring->mmio_base));
-
-	return 0;
 }
 
 /**
@@ -1811,13 +1807,8 @@ int intel_lr_context_deferred_create(struct intel_context *ctx,
 	ctx->engine[ring->id].ringbuf = ringbuf;
 	ctx->engine[ring->id].state = ctx_obj;
 
-	if (ctx == ring->default_context) {
-		ret = lrc_setup_hardware_status_page(ring, ctx_obj);
-		if (ret) {
-			DRM_ERROR("Failed to setup hardware status page\n");
-			goto error;
-		}
-	}
+	if (ctx == ring->default_context)
+		lrc_setup_hardware_status_page(ring, ctx_obj);
 
 	if (ring->id == RCS && !ctx->rcs_initialized) {
 		if (ring->init_context) {