[PATCH 5/9] drm/i915: [sparse] __iomem fixes for debugfs

[Ben Widawsky <ben@bwidawsk.net>]

These were mostly straight forward. No forced casting needed.

Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c |   26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 35462df..cfe3c82 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -586,18 +586,18 @@ static int i915_hws_info(struct seq_file *m, void *data)
 	struct drm_device *dev = node->minor->dev;
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	struct intel_ring_buffer *ring;
-	const volatile u32 __iomem *hws;
+	void __iomem *hws;
 	int i;
 
 	ring = &dev_priv->ring[(uintptr_t)node->info_ent->data];
-	hws = (volatile u32 __iomem *)ring->status_page.page_addr;
+	hws = (void __iomem *)ring->status_page.page_addr;
 	if (hws == NULL)
 		return 0;
 
 	for (i = 0; i < 4096 / sizeof(u32) / 4; i += 4) {
 		seq_printf(m, "0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
-			   i * 4,
-			   hws[i], hws[i + 1], hws[i + 2], hws[i + 3]);
+			   i * 4, ioread32(hws), ioread32(hws + 4),
+			   ioread32(hws + 8), ioread32(hws + 0xc));
 	}
 	return 0;
 }
@@ -622,8 +622,8 @@ static int i915_ringbuffer_data(struct seq_file *m, void *data)
 		uint32_t off;
 
 		for (off = 0; off < ring->size; off += 4) {
-			uint32_t *ptr = (uint32_t *)(virt + off);
-			seq_printf(m, "%08x :  %08x\n", off, *ptr);
+			uint32_t __iomem *ptr = (uint32_t __iomem *)(virt + off);
+			seq_printf(m, "%08x :  %08x\n", off, ioread32(ptr));
 		}
 	}
 	mutex_unlock(&dev->struct_mutex);
@@ -1353,17 +1353,25 @@ static int i915_opregion(struct seq_file *m, void *unused)
 	struct drm_device *dev = node->minor->dev;
 	drm_i915_private_t *dev_priv = dev->dev_private;
 	struct intel_opregion *opregion = &dev_priv->opregion;
+	void *data = kmalloc(OPREGION_SIZE, GFP_KERNEL);
 	int ret;
 
+	if (data == NULL)
+		return -ENOMEM;
+
 	ret = mutex_lock_interruptible(&dev->struct_mutex);
 	if (ret)
-		return ret;
+		goto out;
 
-	if (opregion->header)
-		seq_write(m, opregion->header, OPREGION_SIZE);
+	if (opregion->header) {
+		memcpy_fromio(data, opregion->header, OPREGION_SIZE);
+		seq_write(m, data, OPREGION_SIZE);
+	}
 
 	mutex_unlock(&dev->struct_mutex);
 
+out:
+	kfree(data);
 	return 0;
 }
 
-- 
1.7.10