linux-kernel - [PATCH v4 1/4] PCI/portdrv: Make use of pci_dev::bridge

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Message-Id: <20240326-pci-bridge-d3-v4-1-f1dce1d1f648@linaro.org>
Date: Tue, 26 Mar 2024 16:18:17 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Bjorn Helgaas <bhelgaas@...gle.com>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>
Cc: linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-acpi@...r.kernel.org, lukas@...ner.de, 
 mika.westerberg@...ux.intel.com, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH v4 1/4] PCI/portdrv: Make use of pci_dev::bridge_d3 for
 checking the D3 possibility

PCI core is already caching the value of pci_bridge_d3_possible() in
pci_dev::bridge_d3 during pci_pm_init(). Since the value is not going to
change, let's make use of the cached value.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/pci/pcie/portdrv.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/pcie/portdrv.c b/drivers/pci/pcie/portdrv.c
index 14a4b89a3b83..1f02e5d7b2e9 100644
--- a/drivers/pci/pcie/portdrv.c
+++ b/drivers/pci/pcie/portdrv.c
@@ -702,7 +702,7 @@ static int pcie_portdrv_probe(struct pci_dev *dev,
 	dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_NO_DIRECT_COMPLETE |
 					   DPM_FLAG_SMART_SUSPEND);

-	if (pci_bridge_d3_possible(dev)) {
+	if (dev->bridge_d3) {
 		/*
 		 * Keep the port resumed 100ms to make sure things like
 		 * config space accesses from userspace (lspci) will not
@@ -720,7 +720,7 @@ static int pcie_portdrv_probe(struct pci_dev *dev,

 static void pcie_portdrv_remove(struct pci_dev *dev)
 {
-	if (pci_bridge_d3_possible(dev)) {
+	if (dev->bridge_d3) {
 		pm_runtime_forbid(&dev->dev);
 		pm_runtime_get_noresume(&dev->dev);
 		pm_runtime_dont_use_autosuspend(&dev->dev);
@@ -733,7 +733,7 @@ static void pcie_portdrv_remove(struct pci_dev *dev)

 static void pcie_portdrv_shutdown(struct pci_dev *dev)
 {
-	if (pci_bridge_d3_possible(dev)) {
+	if (dev->bridge_d3) {
 		pm_runtime_forbid(&dev->dev);
 		pm_runtime_get_noresume(&dev->dev);
 		pm_runtime_dont_use_autosuspend(&dev->dev);

-- 
2.25.1