Revert "PCI: Add quirk for LS7A to avoid reboot failure"

LoongArch inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7BC4C

--------------------------------

This reverts commit cea488db.
Signed-off-by: NHongchen Zhang <zhanghongchen@loongson.cn>
(cherry picked from commit b70cfc41)

drivers/pci/controller/pci-loongson.c

@@ -115,23 +115,6 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
 			DEV_PCIE_PORT_2, loongson_mrrs_quirk);
 
-static void loongson_bmaster_quirk(struct pci_dev *pdev)
-{
-	/*
-	 * Some Loongson PCIe ports will cause CPU deadlock if disable
-	 * the Bus Master bit during poweroff/reboot.
-	 */
-	struct pci_host_bridge *bridge = pci_find_host_bridge(pdev->bus);
-
-	bridge->no_dis_bmaster = 1;
-}
-DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
-			DEV_PCIE_PORT_0, loongson_bmaster_quirk);
-DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
-			DEV_PCIE_PORT_1, loongson_bmaster_quirk);
-DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
-			DEV_PCIE_PORT_2, loongson_bmaster_quirk);
-
 static void loongson_pci_pin_quirk(struct pci_dev *pdev)
 {
 	pdev->pin = 1 + (PCI_FUNC(pdev->devfn) & 3);

drivers/pci/pcie/portdrv_core.c

@@ -486,6 +486,7 @@ void pcie_port_device_remove(struct pci_dev *dev)
 {
 	device_for_each_child(&dev->dev, NULL, remove_iter);
 	pci_free_irq_vectors(dev);
+	pci_disable_device(dev);
 }
 
 /**

drivers/pci/pcie/portdrv_pci.c

@@ -148,24 +148,6 @@ static void pcie_portdrv_remove(struct pci_dev *dev)
 	}
 
 	pcie_port_device_remove(dev);
-
-	pci_disable_device(dev);
-}
-
-static void pcie_portdrv_shutdown(struct pci_dev *dev)
-{
-	struct pci_host_bridge *bridge = pci_find_host_bridge(dev->bus);
-
-	if (pci_bridge_d3_possible(dev)) {
-		pm_runtime_forbid(&dev->dev);
-		pm_runtime_get_noresume(&dev->dev);
-		pm_runtime_dont_use_autosuspend(&dev->dev);
-	}
-
-	pcie_port_device_remove(dev);
-
-	if (!bridge->no_dis_bmaster)
-		pci_disable_device(dev);
 }
 
 static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev,
@@ -236,7 +218,7 @@ static struct pci_driver pcie_portdriver = {
 
 	.probe		= pcie_portdrv_probe,
 	.remove		= pcie_portdrv_remove,
-	.shutdown	= pcie_portdrv_shutdown,
+	.shutdown	= pcie_portdrv_remove,
 
 	.err_handler	= &pcie_portdrv_err_handler,
 

include/linux/pci.h

@@ -575,7 +575,6 @@ struct pci_host_bridge {
 	unsigned int	ignore_reset_delay:1;	/* For entire hierarchy */
 	unsigned int	no_ext_tags:1;		/* No Extended Tags */
 	unsigned int	no_inc_mrrs:1;		/* No Increase MRRS */
-	unsigned int	no_dis_bmaster:1;	/* No Disable Bus Master */
 	unsigned int	native_aer:1;		/* OS may use PCIe AER */
 	unsigned int	native_pcie_hotplug:1;	/* OS may use PCIe hotplug */
 	unsigned int	native_shpc_hotplug:1;	/* OS may use SHPC hotplug */