Merge tag 'pci-v6.6-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci

Pull PCI fixes from Bjorn Helgaas:

 - Fix a qcom register offset that broke IPQ8074 PCIe controller
   enumeration (Sricharan Ramabadhran)

 - Handle interrupt parsing failures when creating a device tree node to
   avoid using uninitialized data (Lizhi Hou)

 - Clean up if adding PCI device node fails when creating a device tree
   node to avoid a memory leak (Lizhi Hou)

 - If a link is down, mark all downstream devices as "disconnected" so
   we don't wait for them on resume (Mika Westerberg)

* tag 'pci-v6.6-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci:
  PCI/PM: Mark devices disconnected if upstream PCIe link is down on resume
  PCI: of: Destroy changeset when adding PCI device node fails
  PCI: of_property: Handle interrupt parsing failures
  PCI: qcom: Fix IPQ8074 enumeration

4 files changed, 43 insertions, 19 deletions

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index e2f29404c84e..64420ecc24d1 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -43,7 +43,6 @@
 #define PARF_PHY_REFCLK				0x4c
 #define PARF_CONFIG_BITS			0x50
 #define PARF_DBI_BASE_ADDR			0x168
-#define PARF_SLV_ADDR_SPACE_SIZE_2_3_3		0x16c /* Register offset specific to IP ver 2.3.3 */
 #define PARF_MHI_CLOCK_RESET_CTRL		0x174
 #define PARF_AXI_MSTR_WR_ADDR_HALT		0x178
 #define PARF_AXI_MSTR_WR_ADDR_HALT_V2		0x1a8
@@ -797,8 +796,7 @@ static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie)
 	u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP);
 	u32 val;
 
-	writel(SLV_ADDR_SPACE_SZ,
-		pcie->parf + PARF_SLV_ADDR_SPACE_SIZE_2_3_3);
+	writel(SLV_ADDR_SPACE_SZ, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE);
 
 	val = readl(pcie->parf + PARF_PHY_CTRL);
 	val &= ~PHY_TEST_PWR_DOWN;
diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index 2af64bcb7da3..51e3dd0ea5ab 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -657,30 +657,33 @@ void of_pci_make_dev_node(struct pci_dev *pdev)
 
 	cset = kmalloc(sizeof(*cset), GFP_KERNEL);
 	if (!cset)
-		goto failed;
+		goto out_free_name;
 	of_changeset_init(cset);
 
 	np = of_changeset_create_node(cset, ppnode, name);
 	if (!np)
-		goto failed;
-	np->data = cset;
+		goto out_destroy_cset;
 
 	ret = of_pci_add_properties(pdev, cset, np);
 	if (ret)
-		goto failed;
+		goto out_free_node;
 
 	ret = of_changeset_apply(cset);
 	if (ret)
-		goto failed;
+		goto out_free_node;
 
+	np->data = cset;
 	pdev->dev.of_node = np;
 	kfree(name);
 
 	return;
 
-failed:
-	if (np)
-		of_node_put(np);
+out_free_node:
+	of_node_put(np);
+out_destroy_cset:
+	of_changeset_destroy(cset);
+	kfree(cset);
+out_free_name:
 	kfree(name);
 }
 #endif
diff --git a/drivers/pci/of_property.c b/drivers/pci/of_property.c
index 710ec35ba4a1..c2c7334152bc 100644
--- a/drivers/pci/of_property.c
+++ b/drivers/pci/of_property.c
@@ -186,8 +186,8 @@ static int of_pci_prop_interrupts(struct pci_dev *pdev,
 static int of_pci_prop_intr_map(struct pci_dev *pdev, struct of_changeset *ocs,
 				struct device_node *np)
 {
+	u32 i, addr_sz[OF_PCI_MAX_INT_PIN] = { 0 }, map_sz = 0;
 	struct of_phandle_args out_irq[OF_PCI_MAX_INT_PIN];
-	u32 i, addr_sz[OF_PCI_MAX_INT_PIN], map_sz = 0;
 	__be32 laddr[OF_PCI_ADDRESS_CELLS] = { 0 };
 	u32 int_map_mask[] = { 0xffff00, 0, 0, 7 };
 	struct device_node *pnode;
@@ -213,33 +213,44 @@ static int of_pci_prop_intr_map(struct pci_dev *pdev, struct of_changeset *ocs,
 		out_irq[i].args[0] = pin;
 		ret = of_irq_parse_raw(laddr, &out_irq[i]);
 		if (ret) {
-			pci_err(pdev, "parse irq %d failed, ret %d", pin, ret);
+			out_irq[i].np = NULL;
+			pci_dbg(pdev, "parse irq %d failed, ret %d", pin, ret);
 			continue;
 		}
-		ret = of_property_read_u32(out_irq[i].np, "#address-cells",
-					   &addr_sz[i]);
-		if (ret)
-			addr_sz[i] = 0;
+		of_property_read_u32(out_irq[i].np, "#address-cells",
+				     &addr_sz[i]);
 	}
 
 	list_for_each_entry(child, &pdev->subordinate->devices, bus_list) {
 		for (pin = 1; pin <= OF_PCI_MAX_INT_PIN; pin++) {
 			i = pci_swizzle_interrupt_pin(child, pin) - 1;
+			if (!out_irq[i].np)
+				continue;
 			map_sz += 5 + addr_sz[i] + out_irq[i].args_count;
 		}
 	}
 
+	/*
+	 * Parsing interrupt failed for all pins. In this case, it does not
+	 * need to generate interrupt-map property.
+	 */
+	if (!map_sz)
+		return 0;
+
 	int_map = kcalloc(map_sz, sizeof(u32), GFP_KERNEL);
 	mapp = int_map;
 
 	list_for_each_entry(child, &pdev->subordinate->devices, bus_list) {
 		for (pin = 1; pin <= OF_PCI_MAX_INT_PIN; pin++) {
+			i = pci_swizzle_interrupt_pin(child, pin) - 1;
+			if (!out_irq[i].np)
+				continue;
+
 			*mapp = (child->bus->number << 16) |
 				(child->devfn << 8);
 			mapp += OF_PCI_ADDRESS_CELLS;
 			*mapp = pin;
 			mapp++;
-			i = pci_swizzle_interrupt_pin(child, pin) - 1;
 			*mapp = out_irq[i].np->phandle;
 			mapp++;
 			if (addr_sz[i]) {
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index a79c110c7e51..51ec9e7e784f 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -572,7 +572,19 @@ static void pci_pm_default_resume_early(struct pci_dev *pci_dev)
 
 static void pci_pm_bridge_power_up_actions(struct pci_dev *pci_dev)
 {
-	pci_bridge_wait_for_secondary_bus(pci_dev, "resume");
+	int ret;
+
+	ret = pci_bridge_wait_for_secondary_bus(pci_dev, "resume");
+	if (ret) {
+		/*
+		 * The downstream link failed to come up, so mark the
+		 * devices below as disconnected to make sure we don't
+		 * attempt to resume them.
+		 */
+		pci_walk_bus(pci_dev->subordinate, pci_dev_set_disconnected,
+			     NULL);
+		return;
+	}
 
 	/*
 	 * When powering on a bridge from D3cold, the whole hierarchy may be