Backmerge tag 'v4.9-rc8' into drm-next

Linux 4.9-rc8

Daniel requested this so we could apply some follow on fixes cleanly to -next.

4 files changed, 34 insertions, 16 deletions

diff --git a/drivers/pci/host/pcie-designware-plat.c b/drivers/pci/host/pcie-designware-plat.c
index 8df6312ed300..1a02038c4640 100644
--- a/drivers/pci/host/pcie-designware-plat.c
+++ b/drivers/pci/host/pcie-designware-plat.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
  *
- * Authors: Joao Pinto <jpmpinto@gmail.com>
+ * Authors: Joao Pinto <Joao.Pinto@synopsys.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
diff --git a/drivers/pci/pci-mid.c b/drivers/pci/pci-mid.c
index 55f453de562e..c7f3408e3148 100644
--- a/drivers/pci/pci-mid.c
+++ b/drivers/pci/pci-mid.c
@@ -29,6 +29,11 @@ static int mid_pci_set_power_state(struct pci_dev *pdev, pci_power_t state)
 	return intel_mid_pci_set_power_state(pdev, state);
 }
 
+static pci_power_t mid_pci_get_power_state(struct pci_dev *pdev)
+{
+	return intel_mid_pci_get_power_state(pdev);
+}
+
 static pci_power_t mid_pci_choose_state(struct pci_dev *pdev)
 {
 	return PCI_D3hot;
@@ -52,6 +57,7 @@ static bool mid_pci_need_resume(struct pci_dev *dev)
 static struct pci_platform_pm_ops mid_pci_platform_pm = {
 	.is_manageable	= mid_pci_power_manageable,
 	.set_state	= mid_pci_set_power_state,
+	.get_state	= mid_pci_get_power_state,
 	.choose_state	= mid_pci_choose_state,
 	.sleep_wake	= mid_pci_sleep_wake,
 	.run_wake	= mid_pci_run_wake,
diff --git a/drivers/pci/pcie/aer/aer_inject.c b/drivers/pci/pcie/aer/aer_inject.c
index db553dc22c8e..2b6a59266689 100644
--- a/drivers/pci/pcie/aer/aer_inject.c
+++ b/drivers/pci/pcie/aer/aer_inject.c
@@ -307,20 +307,6 @@ out:
 	return 0;
 }
 
-static struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
-{
-	while (1) {
-		if (!pci_is_pcie(dev))
-			break;
-		if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
-			return dev;
-		if (!dev->bus->self)
-			break;
-		dev = dev->bus->self;
-	}
-	return NULL;
-}
-
 static int find_aer_device_iter(struct device *device, void *data)
 {
 	struct pcie_device **result = data;
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index ab002671fa60..104c46d53121 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1439,6 +1439,21 @@ static void program_hpp_type1(struct pci_dev *dev, struct hpp_type1 *hpp)
 		dev_warn(&dev->dev, "PCI-X settings not supported\n");
 }
 
+static bool pcie_root_rcb_set(struct pci_dev *dev)
+{
+	struct pci_dev *rp = pcie_find_root_port(dev);
+	u16 lnkctl;
+
+	if (!rp)
+		return false;
+
+	pcie_capability_read_word(rp, PCI_EXP_LNKCTL, &lnkctl);
+	if (lnkctl & PCI_EXP_LNKCTL_RCB)
+		return true;
+
+	return false;
+}
+
 static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
 {
 	int pos;
@@ -1468,9 +1483,20 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
 			~hpp->pci_exp_devctl_and, hpp->pci_exp_devctl_or);
 
 	/* Initialize Link Control Register */
-	if (pcie_cap_has_lnkctl(dev))
+	if (pcie_cap_has_lnkctl(dev)) {
+
+		/*
+		 * If the Root Port supports Read Completion Boundary of
+		 * 128, set RCB to 128.  Otherwise, clear it.
+		 */
+		hpp->pci_exp_lnkctl_and |= PCI_EXP_LNKCTL_RCB;
+		hpp->pci_exp_lnkctl_or &= ~PCI_EXP_LNKCTL_RCB;
+		if (pcie_root_rcb_set(dev))
+			hpp->pci_exp_lnkctl_or |= PCI_EXP_LNKCTL_RCB;
+
 		pcie_capability_clear_and_set_word(dev, PCI_EXP_LNKCTL,
 			~hpp->pci_exp_lnkctl_and, hpp->pci_exp_lnkctl_or);
+	}
 
 	/* Find Advanced Error Reporting Enhanced Capability */
 	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);