v4.19.13 snapshot.
diff --git a/drivers/ide/ide-scan-pci.c b/drivers/ide/ide-scan-pci.c
new file mode 100644
index 0000000..acf8748
--- /dev/null
+++ b/drivers/ide/ide-scan-pci.c
@@ -0,0 +1,115 @@
+/*
+ * support for probing IDE PCI devices in the PCI bus order
+ *
+ * Copyright (c) 1998-2000 Andre Hedrick <andre@linux-ide.org>
+ * Copyright (c) 1995-1998 Mark Lord
+ *
+ * May be copied or modified under the terms of the GNU General Public License
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ide.h>
+
+/*
+ * Module interfaces
+ */
+
+static int pre_init = 1; /* Before first ordered IDE scan */
+static LIST_HEAD(ide_pci_drivers);
+
+/*
+ * __ide_pci_register_driver - attach IDE driver
+ * @driver: pci driver
+ * @module: owner module of the driver
+ *
+ * Registers a driver with the IDE layer. The IDE layer arranges that
+ * boot time setup is done in the expected device order and then
+ * hands the controllers off to the core PCI code to do the rest of
+ * the work.
+ *
+ * Returns are the same as for pci_register_driver
+ */
+
+int __ide_pci_register_driver(struct pci_driver *driver, struct module *module,
+ const char *mod_name)
+{
+ if (!pre_init)
+ return __pci_register_driver(driver, module, mod_name);
+ driver->driver.owner = module;
+ list_add_tail(&driver->node, &ide_pci_drivers);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(__ide_pci_register_driver);
+
+/**
+ * ide_scan_pcidev - find an IDE driver for a device
+ * @dev: PCI device to check
+ *
+ * Look for an IDE driver to handle the device we are considering.
+ * This is only used during boot up to get the ordering correct. After
+ * boot up the pci layer takes over the job.
+ */
+
+static int __init ide_scan_pcidev(struct pci_dev *dev)
+{
+ struct list_head *l;
+ struct pci_driver *d;
+ int ret;
+
+ list_for_each(l, &ide_pci_drivers) {
+ d = list_entry(l, struct pci_driver, node);
+ if (d->id_table) {
+ const struct pci_device_id *id =
+ pci_match_id(d->id_table, dev);
+
+ if (id != NULL) {
+ pci_assign_irq(dev);
+ ret = d->probe(dev, id);
+ if (ret >= 0) {
+ dev->driver = d;
+ pci_dev_get(dev);
+ return 1;
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+/**
+ * ide_scan_pcibus - perform the initial IDE driver scan
+ *
+ * Perform the initial bus rather than driver ordered scan of the
+ * PCI drivers. After this all IDE pci handling becomes standard
+ * module ordering not traditionally ordered.
+ */
+
+static int __init ide_scan_pcibus(void)
+{
+ struct pci_dev *dev = NULL;
+ struct pci_driver *d;
+ struct list_head *l, *n;
+
+ pre_init = 0;
+ for_each_pci_dev(dev)
+ ide_scan_pcidev(dev);
+
+ /*
+ * Hand the drivers over to the PCI layer now we
+ * are post init.
+ */
+
+ list_for_each_safe(l, n, &ide_pci_drivers) {
+ list_del(l);
+ d = list_entry(l, struct pci_driver, node);
+ if (__pci_register_driver(d, d->driver.owner,
+ d->driver.mod_name))
+ printk(KERN_ERR "%s: failed to register %s driver\n",
+ __func__, d->driver.mod_name);
+ }
+
+ return 0;
+}
+device_initcall(ide_scan_pcibus);