drm/i915: make i915_stolen_to_physical() return phys_addr_t

The i915_stolen_to_physical() function has 'unsigned long' as its
return type but it returns the 'base' variable, which is of type
'u32'. The only place where this function is called assigns the
returned value to dev_priv->mm.stolen_base, which is of type
'phys_addr_t'. The return value is actually a physical address and
everything else in the stolen memory code seems to be using
phys_addr_t, so fix i915_stolen_to_physical() to use phys_addr_t.

v2: Add missing blank lines after declarations (Chris, checkpatch.pl).

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1485461947-16030-1-git-send-email-paulo.r.zanoni@intel.com

drivers/gpu/drm/i915/i915_gem_stolen.c

@@ -79,12 +79,12 @@ void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv,
 	mutex_unlock(&dev_priv->mm.stolen_lock);
 }
 
-static unsigned long i915_stolen_to_physical(struct drm_i915_private *dev_priv)
+static phys_addr_t i915_stolen_to_physical(struct drm_i915_private *dev_priv)
 {
 	struct pci_dev *pdev = dev_priv->drm.pdev;
 	struct i915_ggtt *ggtt = &dev_priv->ggtt;
 	struct resource *r;
-	u32 base;
+	phys_addr_t base;
 
 	/* Almost universally we can find the Graphics Base of Stolen Memory
 	 * at register BSM (0x5c) in the igfx configuration space. On a few
@@ -196,7 +196,7 @@ static unsigned long i915_stolen_to_physical(struct drm_i915_private *dev_priv)
 	if (INTEL_GEN(dev_priv) <= 4 &&
 	    !IS_G33(dev_priv) && !IS_PINEVIEW(dev_priv) && !IS_G4X(dev_priv)) {
 		struct {
-			u32 start, end;
+			phys_addr_t start, end;
 		} stolen[2] = {
 			{ .start = base, .end = base + ggtt->stolen_size, },
 			{ .start = base, .end = base + ggtt->stolen_size, },
@@ -228,11 +228,13 @@ static unsigned long i915_stolen_to_physical(struct drm_i915_private *dev_priv)
 
 		if (stolen[0].start != stolen[1].start ||
 		    stolen[0].end != stolen[1].end) {
+			phys_addr_t end = base + ggtt->stolen_size - 1;
+
 			DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n",
 				      (unsigned long long)ggtt_start,
 				      (unsigned long long)ggtt_end - 1);
-			DRM_DEBUG_KMS("Stolen memory adjusted to 0x%x-0x%x\n",
-				      base, base + (u32)ggtt->stolen_size - 1);
+			DRM_DEBUG_KMS("Stolen memory adjusted to %pa - %pa\n",
+				      &base, &end);
 		}
 	}
 
@@ -261,8 +263,10 @@ static unsigned long i915_stolen_to_physical(struct drm_i915_private *dev_priv)
 		 * range. Apparently this works.
 		 */
 		if (r == NULL && !IS_GEN3(dev_priv)) {
-			DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n",
-				  base, base + (uint32_t)ggtt->stolen_size);
+			phys_addr_t end = base + ggtt->stolen_size;
+
+			DRM_ERROR("conflict detected with stolen region: [%pa - %pa]\n",
+				  &base, &end);
 			base = 0;
 		}
 	}