diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index 233fe8a88264..69202d1eb8fb 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -275,15 +275,22 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp)
 		goto err_pcie;
 	}
 
-	/* allow the clocks to stabilize */
-	usleep_range(200, 500);
-
 	/* power up core phy and enable ref clock */
 	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
 			IMX6Q_GPR1_PCIE_TEST_PD, 0 << 18);
+	/*
+	 * the async reset input need ref clock to sync internally,
+	 * when the ref clock comes after reset, internal synced
+	 * reset time is too short, cannot meet the requirement.
+	 * add one ~10us delay here.
+	 */
+	udelay(10);
 	regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
 			IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16);
 
+	/* allow the clocks to stabilize */
+	usleep_range(200, 500);
+
 	/* Some boards don't have PCIe reset GPIO. */
 	if (gpio_is_valid(imx6_pcie->reset_gpio)) {
 		gpio_set_value(imx6_pcie->reset_gpio, 0);
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index 3a5e7e28b874..07aa722bb12c 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -262,13 +262,6 @@ static int pciehp_probe(struct pcie_device *dev)
 		goto err_out_none;
 	}
 
-	if (!dev->port->subordinate) {
-		/* Can happen if we run out of bus numbers during probe */
-		dev_err(&dev->device,
-			"Hotplug bridge without secondary bus, ignoring\n");
-		goto err_out_none;
-	}
-
 	ctrl = pcie_init(dev);
 	if (!ctrl) {
 		dev_err(&dev->device, "Controller initialization failed\n");
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 92b6d9ab00e4..2c6643fdc0cf 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -185,7 +185,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR_RO(modalias);
 
-static ssize_t enabled_store(struct device *dev, struct device_attribute *attr,
+static ssize_t enable_store(struct device *dev, struct device_attribute *attr,
 			     const char *buf, size_t count)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
@@ -210,7 +210,7 @@ static ssize_t enabled_store(struct device *dev, struct device_attribute *attr,
 	return result < 0 ? result : count;
 }
 
-static ssize_t enabled_show(struct device *dev, struct device_attribute *attr,
+static ssize_t enable_show(struct device *dev, struct device_attribute *attr,
 			    char *buf)
 {
 	struct pci_dev *pdev;
@@ -218,7 +218,7 @@ static ssize_t enabled_show(struct device *dev, struct device_attribute *attr,
 	pdev = to_pci_dev(dev);
 	return sprintf(buf, "%u\n", atomic_read(&pdev->enable_cnt));
 }
-static DEVICE_ATTR_RW(enabled);
+static DEVICE_ATTR_RW(enable);
 
 #ifdef CONFIG_NUMA
 static ssize_t numa_node_show(struct device *dev, struct device_attribute *attr,
@@ -563,7 +563,7 @@ static struct attribute *pci_dev_attrs[] = {
 #endif
 	&dev_attr_dma_mask_bits.attr,
 	&dev_attr_consistent_dma_mask_bits.attr,
-	&dev_attr_enabled.attr,
+	&dev_attr_enable.attr,
 	&dev_attr_broken_parity_status.attr,
 	&dev_attr_msi_bus.attr,
 #if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)