Merge tag 'pci-v4.18-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

- Fix crashes that happen when PHY drivers are left disabled in the V3
Semiconductor, MediaTek, Faraday, Aardvark, DesignWare, Versatile,
and X-Gene host controller drivers (Sergei Shtylyov)

- Fix a NULL pointer dereference in the endpoint library configfs
support (Kishon Vijay Abraham I)

- Fix a race condition in Hyper-V IRQ handling (Dexuan Cui)

* tag 'pci-v4.18-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI: v3-semi: Fix I/O space page leak
PCI: mediatek: Fix I/O space page leak
PCI: faraday: Fix I/O space page leak
PCI: aardvark: Fix I/O space page leak
PCI: designware: Fix I/O space page leak
PCI: versatile: Fix I/O space page leak
PCI: xgene: Fix I/O space page leak
PCI: OF: Fix I/O space page leak
PCI: endpoint: Fix NULL pointer dereference error when CONFIGFS is disabled
PCI: hv: Disable/enable IRQs rather than BH in hv_compose_msi_msg()

drivers/pci/controller/dwc/pcie-designware-host.c

···
 	resource_list_for_each_entry_safe(win, tmp, &bridge->windows) {
 		switch (resource_type(win->res)) {
 		case IORESOURCE_IO:
-			ret = pci_remap_iospace(win->res, pp->io_base);
+			ret = devm_pci_remap_iospace(dev, win->res,
+						     pp->io_base);
 			if (ret) {
 				dev_warn(dev, "Error %d: failed to map resource %pR\n",
 					 ret, win->res);

drivers/pci/controller/pci-aardvark.c

···
 					     0,	0xF8000000, 0,
 					     lower_32_bits(res->start),
 					     OB_PCIE_IO);
-			err = pci_remap_iospace(res, iobase);
+			err = devm_pci_remap_iospace(dev, res, iobase);
 			if (err) {
 				dev_warn(dev, "error %d: failed to map resource %pR\n",
 					 err, res);

drivers/pci/controller/pci-ftpci100.c

···
 				dev_err(dev, "illegal IO mem size\n");
 				return -EINVAL;
 			}
-			ret = pci_remap_iospace(io, io_base);
+			ret = devm_pci_remap_iospace(dev, io, io_base);
 			if (ret) {
 				dev_warn(dev, "error %d: failed to map resource %pR\n",
 					 ret, io);

drivers/pci/controller/pci-hyperv.c

···
 	struct pci_bus *pbus;
 	struct pci_dev *pdev;
 	struct cpumask *dest;
+	unsigned long flags;
 	struct compose_comp_ctxt comp;
 	struct tran_int_desc *int_desc;
 	struct {
···
 		 * the channel callback directly when channel->target_cpu is
 		 * the current CPU. When the higher level interrupt code
 		 * calls us with interrupt enabled, let's add the
-		 * local_bh_disable()/enable() to avoid race.
+		 * local_irq_save()/restore() to avoid race:
+		 * hv_pci_onchannelcallback() can also run in tasklet.
 		 */
-		local_bh_disable();
+		local_irq_save(flags);
 
 		if (hbus->hdev->channel->target_cpu == smp_processor_id())
 			hv_pci_onchannelcallback(hbus);
 
-		local_bh_enable();
+		local_irq_restore(flags);
 
 		if (hpdev->state == hv_pcichild_ejecting) {
 			dev_err_once(&hbus->hdev->device,

drivers/pci/controller/pci-v3-semi.c

···
 		v3->io_bus_addr = io->start - win->offset;
 		dev_dbg(dev, "I/O window %pR, bus addr %pap\n",
 			io, &v3->io_bus_addr);
-		ret = pci_remap_iospace(io, io_base);
+		ret = devm_pci_remap_iospace(dev, io, io_base);
 		if (ret) {
 			dev_warn(dev,
 				 "error %d: failed to map resource %pR\n",

drivers/pci/controller/pci-versatile.c

···
 
 		switch (resource_type(res)) {
 		case IORESOURCE_IO:
-			err = pci_remap_iospace(res, iobase);
+			err = devm_pci_remap_iospace(dev, res, iobase);
 			if (err) {
 				dev_warn(dev, "error %d: failed to map resource %pR\n",
 					 err, res);

drivers/pci/controller/pci-xgene.c

···
 		case IORESOURCE_IO:
 			xgene_pcie_setup_ob_reg(port, res, OMR3BARL, io_base,
 						res->start - window->offset);
-			ret = pci_remap_iospace(res, io_base);
+			ret = devm_pci_remap_iospace(dev, res, io_base);
 			if (ret < 0)
 				return ret;
 			break;

drivers/pci/controller/pcie-mediatek.c

···
 	if (err < 0)
 		return err;
 
-	pci_remap_iospace(&pcie->pio, pcie->io.start);
+	devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
 
 	return 0;
 }

drivers/pci/endpoint/pci-epf-core.c

···
 }
 EXPORT_SYMBOL_GPL(pci_epf_alloc_space);
 
+static void pci_epf_remove_cfs(struct pci_epf_driver *driver)
+{
+	struct config_group *group, *tmp;
+
+	if (!IS_ENABLED(CONFIG_PCI_ENDPOINT_CONFIGFS))
+		return;
+
+	mutex_lock(&pci_epf_mutex);
+	list_for_each_entry_safe(group, tmp, &driver->epf_group, group_entry)
+		pci_ep_cfs_remove_epf_group(group);
+	list_del(&driver->epf_group);
+	mutex_unlock(&pci_epf_mutex);
+}
+
 /**
  * pci_epf_unregister_driver() - unregister the PCI EPF driver
  * @driver: the PCI EPF driver that has to be unregistered
···
  */
 void pci_epf_unregister_driver(struct pci_epf_driver *driver)
 {
-	struct config_group *group, *tmp;
-
-	mutex_lock(&pci_epf_mutex);
-	list_for_each_entry_safe(group, tmp, &driver->epf_group, group_entry)
-		pci_ep_cfs_remove_epf_group(group);
-	list_del(&driver->epf_group);
-	mutex_unlock(&pci_epf_mutex);
+	pci_epf_remove_cfs(driver);
 	driver_unregister(&driver->driver);
 }
 EXPORT_SYMBOL_GPL(pci_epf_unregister_driver);
+
+static int pci_epf_add_cfs(struct pci_epf_driver *driver)
+{
+	struct config_group *group;
+	const struct pci_epf_device_id *id;
+
+	if (!IS_ENABLED(CONFIG_PCI_ENDPOINT_CONFIGFS))
+		return 0;
+
+	INIT_LIST_HEAD(&driver->epf_group);
+
+	id = driver->id_table;
+	while (id->name[0]) {
+		group = pci_ep_cfs_add_epf_group(id->name);
+		if (IS_ERR(group)) {
+			pci_epf_remove_cfs(driver);
+			return PTR_ERR(group);
+		}
+
+		mutex_lock(&pci_epf_mutex);
+		list_add_tail(&group->group_entry, &driver->epf_group);
+		mutex_unlock(&pci_epf_mutex);
+		id++;
+	}
+
+	return 0;
+}
 
 /**
  * __pci_epf_register_driver() - register a new PCI EPF driver
···
 			      struct module *owner)
 {
 	int ret;
-	struct config_group *group;
-	const struct pci_epf_device_id *id;
 
 	if (!driver->ops)
 		return -EINVAL;
···
 	if (ret)
 		return ret;
 
-	INIT_LIST_HEAD(&driver->epf_group);
-
-	id = driver->id_table;
-	while (id->name[0]) {
-		group = pci_ep_cfs_add_epf_group(id->name);
-		mutex_lock(&pci_epf_mutex);
-		list_add_tail(&group->group_entry, &driver->epf_group);
-		mutex_unlock(&pci_epf_mutex);
-		id++;
-	}
+	pci_epf_add_cfs(driver);
 
 	return 0;
 }

drivers/pci/of.c

···
 
 		switch (resource_type(res)) {
 		case IORESOURCE_IO:
-			err = pci_remap_iospace(res, iobase);
+			err = devm_pci_remap_iospace(dev, res, iobase);
 			if (err) {
 				dev_warn(dev, "error %d: failed to map resource %pR\n",
 					 err, res);

drivers/pci/pci.c

···
 }
 EXPORT_SYMBOL(pci_unmap_iospace);
 
+static void devm_pci_unmap_iospace(struct device *dev, void *ptr)
+{
+	struct resource **res = ptr;
+
+	pci_unmap_iospace(*res);
+}
+
+/**
+ * devm_pci_remap_iospace - Managed pci_remap_iospace()
+ * @dev: Generic device to remap IO address for
+ * @res: Resource describing the I/O space
+ * @phys_addr: physical address of range to be mapped
+ *
+ * Managed pci_remap_iospace().  Map is automatically unmapped on driver
+ * detach.
+ */
+int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
+			   phys_addr_t phys_addr)
+{
+	const struct resource **ptr;
+	int error;
+
+	ptr = devres_alloc(devm_pci_unmap_iospace, sizeof(*ptr), GFP_KERNEL);
+	if (!ptr)
+		return -ENOMEM;
+
+	error = pci_remap_iospace(res, phys_addr);
+	if (error) {
+		devres_free(ptr);
+	} else	{
+		*ptr = res;
+		devres_add(dev, ptr);
+	}
+
+	return error;
+}
+EXPORT_SYMBOL(devm_pci_remap_iospace);
+
 /**
  * devm_pci_remap_cfgspace - Managed pci_remap_cfgspace()
  * @dev: Generic device to remap IO address for

include/linux/pci.h

···
 unsigned long pci_address_to_pio(phys_addr_t addr);
 phys_addr_t pci_pio_to_address(unsigned long pio);
 int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
+int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
+			   phys_addr_t phys_addr);
 void pci_unmap_iospace(struct resource *res);
 void __iomem *devm_pci_remap_cfgspace(struct device *dev,
 				      resource_size_t offset,