1 files changed, 13 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index d572435cfbe7..71f6de24444e 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -133,6 +133,17 @@ i915_l3_read(struct file *filp, struct kobject *kobj,
         if (ret)
                 return ret;
 
+        if (IS_HASWELL(drm_dev)) {
+                if (dev_priv->l3_parity.remap_info)
+                        memcpy(buf,
+                               dev_priv->l3_parity.remap_info + (offset/4),
+                               count);
+                else
+                        memset(buf, 0, count);
+
+                goto out;
+        }
+
         misccpctl = I915_READ(GEN7_MISCCPCTL);
         I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
 
@@ -141,9 +152,10 @@ i915_l3_read(struct file *filp, struct kobject *kobj,
 
         I915_WRITE(GEN7_MISCCPCTL, misccpctl);
 
+out:
         mutex_unlock(&drm_dev->struct_mutex);
 
-        return i;
+        return count;
 }
 
 static ssize_t