[PATCH 2/2] drm/i915: Remove extraneous variables from intel_crtc_page_flip()

[Chris Wilson <chris@chris-wilson.co.uk>]

Reduce the number of variables used and improve readability by scoping.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_display.c |   31 +++++++++++++++----------------
 1 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index b3b5ff0..bb3941e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4879,15 +4879,12 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 {
 	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_framebuffer *intel_fb;
 	struct drm_i915_gem_object *obj_priv;
 	struct drm_gem_object *obj;
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct intel_unpin_work *work;
 	unsigned long flags;
-	int pipesrc_reg = (intel_crtc->pipe == 0) ? PIPEASRC : PIPEBSRC;
-	int ret, pipesrc;
-	u32 flip_mask;
+	int ret;
 
 	work = kzalloc(sizeof *work, GFP_KERNEL);
 	if (work == NULL)
@@ -4895,8 +4892,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 
 	work->event = event;
 	work->dev = crtc->dev;
-	intel_fb = to_intel_framebuffer(crtc->fb);
-	work->old_fb_obj = intel_fb->obj;
+	work->old_fb_obj = to_intel_framebuffer(crtc->fb)->obj;
 	INIT_WORK(&work->work, intel_unpin_work_fn);
 
 	/* We borrow the event spin lock for protecting unpin_work */
@@ -4911,8 +4907,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 	intel_crtc->unpin_work = work;
 	spin_unlock_irqrestore(&dev->event_lock, flags);
 
-	intel_fb = to_intel_framebuffer(fb);
-	obj = intel_fb->obj;
+	obj = to_intel_framebuffer(fb)->obj;
 
 	mutex_lock(&dev->struct_mutex);
 	ret = intel_pin_and_fence_fb_obj(dev, obj);
@@ -4936,24 +4931,28 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 	atomic_inc(&obj_priv->pending_flip);
 	work->pending_flip_obj = obj;
 
-	if (intel_crtc->plane)
-		flip_mask = I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
-	else
-		flip_mask = I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT;
+	if (IS_GEN3(dev)) {
+		u32 flip_mask;
+
+		if (intel_crtc->plane)
+			flip_mask = I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT;
+		else
+			flip_mask = I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT;
 
-	/* Wait for any previous flip to finish */
-	if (IS_GEN3(dev))
+		/* Wait for any previous flip to finish */
 		while (I915_READ(ISR) & flip_mask)
 			;
+	}
 
 	BEGIN_LP_RING(4);
 	if (IS_I965G(dev)) {
+		int pipesrc_reg = (intel_crtc->pipe == 0) ? PIPEASRC : PIPEBSRC;
+
 		OUT_RING(MI_DISPLAY_FLIP |
 			 MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
 		OUT_RING(fb->pitch);
 		OUT_RING(obj_priv->gtt_offset | obj_priv->tiling_mode);
-		pipesrc = I915_READ(pipesrc_reg); 
-		OUT_RING(pipesrc & 0x0fff0fff);
+		OUT_RING(I915_READ(pipesrc_reg) & 0x0fff0fff);
 	} else {
 		OUT_RING(MI_DISPLAY_FLIP_I915 |
 			 MI_DISPLAY_FLIP_PLANE(intel_crtc->plane));
-- 
1.7.1