3 files changed, 41 insertions, 15 deletions

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 1341a94cc779..aef87fdbd187 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -555,8 +555,10 @@ static unsigned int intel_gtt_mappable_entries(void)
 static void intel_gtt_teardown_scratch_page(void)
 {
 	set_pages_wb(intel_private.scratch_page, 1);
-	pci_unmap_page(intel_private.pcidev, intel_private.scratch_page_dma,
-		       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+	if (intel_private.needs_dmar)
+		pci_unmap_page(intel_private.pcidev,
+			       intel_private.scratch_page_dma,
+			       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 	__free_page(intel_private.scratch_page);
 }
 
@@ -1346,16 +1348,6 @@ int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev,
 {
 	int i, mask;
 
-	/*
-	 * Can be called from the fake agp driver but also directly from
-	 * drm/i915.ko. Hence we need to check whether everything is set up
-	 * already.
-	 */
-	if (intel_private.driver) {
-		intel_private.refcount++;
-		return 1;
-	}
-
 	for (i = 0; intel_gtt_chipsets[i].name != NULL; i++) {
 		if (gpu_pdev) {
 			if (gpu_pdev->device ==
@@ -1376,16 +1368,26 @@ int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev,
 	if (!intel_private.driver)
 		return 0;
 
-	intel_private.refcount++;
-
 #if IS_ENABLED(CONFIG_AGP_INTEL)
 	if (bridge) {
+		if (INTEL_GTT_GEN > 1)
+			return 0;
+
 		bridge->driver = &intel_fake_agp_driver;
 		bridge->dev_private_data = &intel_private;
 		bridge->dev = bridge_pdev;
 	}
 #endif
 
+
+	/*
+	 * Can be called from the fake agp driver but also directly from
+	 * drm/i915.ko. Hence we need to check whether everything is set up
+	 * already.
+	 */
+	if (intel_private.refcount++)
+		return 1;
+
 	intel_private.bridge_dev = pci_dev_get(bridge_pdev);
 
 	dev_info(&bridge_pdev->dev, "Intel %s Chipset\n", intel_gtt_chipsets[i].name);
@@ -1430,6 +1432,8 @@ void intel_gmch_remove(void)
 	if (--intel_private.refcount)
 		return;
 
+	if (intel_private.scratch_page)
+		intel_gtt_teardown_scratch_page();
 	if (intel_private.pcidev)
 		pci_dev_put(intel_private.pcidev);
 	if (intel_private.bridge_dev)
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index 240b6cf1d97c..be54e5331a45 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -42,7 +42,7 @@
 /*
  * The High Precision Event Timer driver.
  * This driver is closely modelled after the rtc.c driver.
- * http://www.intel.com/hardwaredesign/hpetspec_1.pdf
+ * See HPET spec revision 1.
  */
 #define	HPET_USER_FREQ	(64)
 #define	HPET_DRIFT	(500)
diff --git a/drivers/char/random.c b/drivers/char/random.c
index d0da5d852d41..b583e5336630 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1819,6 +1819,28 @@ unsigned int get_random_int(void)
 EXPORT_SYMBOL(get_random_int);
 
 /*
+ * Same as get_random_int(), but returns unsigned long.
+ */
+unsigned long get_random_long(void)
+{
+	__u32 *hash;
+	unsigned long ret;
+
+	if (arch_get_random_long(&ret))
+		return ret;
+
+	hash = get_cpu_var(get_random_int_hash);
+
+	hash[0] += current->pid + jiffies + random_get_entropy();
+	md5_transform(hash, random_int_secret);
+	ret = *(unsigned long *)hash;
+	put_cpu_var(get_random_int_hash);
+
+	return ret;
+}
+EXPORT_SYMBOL(get_random_long);
+
+/*
  * randomize_range() returns a start address such that
  *
  *    [...... <range> .....]