Merge android-4.4.161 (8e7f196) into msm-4.4

* refs/heads/tmp-8e7f196
  Linux 4.4.161
  ebtables: arpreply: Add the standard target sanity check
  ath10k: fix scan crash due to incorrect length calculation
  tcp: add tcp_ooo_try_coalesce() helper
  tcp: call tcp_drop() from tcp_data_queue_ofo()
  tcp: free batches of packets in tcp_prune_ofo_queue()
  tcp: fix a stale ooo_last_skb after a replace
  tcp: use an RB tree for ooo receive queue
  tcp: increment sk_drops for dropped rx packets
  ubifs: Check for name being NULL while mounting
  ucma: fix a use-after-free in ucma_resolve_ip()
  ARC: clone syscall to setp r25 as thread pointer
  powerpc/fadump: Return error when fadump registration fails
  ath10k: fix use-after-free in ath10k_wmi_cmd_send_nowait
  cgroup: Fix deadlock in cpu hotplug path
  ext4: always verify the magic number in xattr blocks
  of: unittest: Disable interrupt node tests for old world MAC systems
  USB: serial: simple: add Motorola Tetra MTP6550 id
  xhci: Add missing CAS workaround for Intel Sunrise Point xHCI
  dm cache: fix resize crash if user doesn't reload cache table
  PM / core: Clear the direct_complete flag on errors
  mac80211: fix setting IEEE80211_KEY_FLAG_RX_MGMT for AP mode keys
  PCI: Reprogram bridge prefetch registers on resume
  x86/vdso: Fix vDSO syscall fallback asm constraint regression
  x86/vdso: Fix asm constraints on vDSO syscall fallbacks
  fbdev/omapfb: fix omapfb_memory_read infoleak
  mm/vmstat.c: skip NR_TLB_REMOTE_FLUSH* properly

Change-Id: If31f9e57679a3b1deb1049c86aeaead5ccbd64a6
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>

1 files changed, 19 insertions, 8 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 295bf1472d02..5073ab023123 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1064,12 +1064,12 @@ int pci_save_state(struct pci_dev *dev)
 EXPORT_SYMBOL(pci_save_state);
 
 static void pci_restore_config_dword(struct pci_dev *pdev, int offset,
-				     u32 saved_val, int retry)
+				     u32 saved_val, int retry, bool force)
 {
 	u32 val;
 
 	pci_read_config_dword(pdev, offset, &val);
-	if (val == saved_val)
+	if (!force && val == saved_val)
 		return;
 
 	for (;;) {
@@ -1088,25 +1088,36 @@ static void pci_restore_config_dword(struct pci_dev *pdev, int offset,
 }
 
 static void pci_restore_config_space_range(struct pci_dev *pdev,
-					   int start, int end, int retry)
+					   int start, int end, int retry,
+					   bool force)
 {
 	int index;
 
 	for (index = end; index >= start; index--)
 		pci_restore_config_dword(pdev, 4 * index,
 					 pdev->saved_config_space[index],
-					 retry);
+					 retry, force);
 }
 
 static void pci_restore_config_space(struct pci_dev *pdev)
 {
 	if (pdev->hdr_type == PCI_HEADER_TYPE_NORMAL) {
-		pci_restore_config_space_range(pdev, 10, 15, 0);
+		pci_restore_config_space_range(pdev, 10, 15, 0, false);
 		/* Restore BARs before the command register. */
-		pci_restore_config_space_range(pdev, 4, 9, 10);
-		pci_restore_config_space_range(pdev, 0, 3, 0);
+		pci_restore_config_space_range(pdev, 4, 9, 10, false);
+		pci_restore_config_space_range(pdev, 0, 3, 0, false);
+	} else if (pdev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
+		pci_restore_config_space_range(pdev, 12, 15, 0, false);
+
+		/*
+		 * Force rewriting of prefetch registers to avoid S3 resume
+		 * issues on Intel PCI bridges that occur when these
+		 * registers are not explicitly written.
+		 */
+		pci_restore_config_space_range(pdev, 9, 11, 0, true);
+		pci_restore_config_space_range(pdev, 0, 8, 0, false);
 	} else {
-		pci_restore_config_space_range(pdev, 0, 15, 0);
+		pci_restore_config_space_range(pdev, 0, 15, 0, false);
 	}
 }