--- zzzz-none-000/linux-3.10.107/arch/powerpc/kernel/io-workarounds.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/powerpc/kernel/io-workarounds.c	2021-02-04 17:41:59.000000000 +0000
@@ -53,8 +53,10 @@
 	return NULL;
 }
 
+#ifdef CONFIG_PPC_INDIRECT_MMIO
 struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
 {
+	unsigned hugepage_shift;
 	struct iowa_bus *bus;
 	int token;
 
@@ -69,12 +71,18 @@
 		vaddr = (unsigned long)PCI_FIX_ADDR(addr);
 		if (vaddr < PHB_IO_BASE || vaddr >= PHB_IO_END)
 			return NULL;
-
-		ptep = find_linux_pte(init_mm.pgd, vaddr);
+		/*
+		 * We won't find huge pages here (iomem). Also can't hit
+		 * a page table free due to init_mm
+		 */
+		ptep = __find_linux_pte_or_hugepte(init_mm.pgd, vaddr,
+						   NULL, &hugepage_shift);
 		if (ptep == NULL)
 			paddr = 0;
-		else
+		else {
+			WARN_ON(hugepage_shift);
 			paddr = pte_pfn(*ptep) << PAGE_SHIFT;
+		}
 		bus = iowa_pci_find(vaddr, paddr);
 
 		if (bus == NULL)
@@ -83,13 +91,25 @@
 
 	return bus;
 }
+#else /* CONFIG_PPC_INDIRECT_MMIO */
+struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR addr)
+{
+	return NULL;
+}
+#endif /* !CONFIG_PPC_INDIRECT_MMIO */
 
+#ifdef CONFIG_PPC_INDIRECT_PIO
 struct iowa_bus *iowa_pio_find_bus(unsigned long port)
 {
 	unsigned long vaddr = (unsigned long)pci_io_base + port;
 	return iowa_pci_find(vaddr, 0);
 }
-
+#else
+struct iowa_bus *iowa_pio_find_bus(unsigned long port)
+{
+	return NULL;
+}
+#endif
 
 #define DEF_PCI_AC_RET(name, ret, at, al, space, aa)		\
 static ret iowa_##name at					\
@@ -130,6 +150,7 @@
 
 };
 
+#ifdef CONFIG_PPC_INDIRECT_MMIO
 static void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size,
 				  unsigned long flags, void *caller)
 {
@@ -144,6 +165,9 @@
 	}
 	return res;
 }
+#else /* CONFIG_PPC_INDIRECT_MMIO */
+#define iowa_ioremap NULL
+#endif /* !CONFIG_PPC_INDIRECT_MMIO */
 
 /* Enable IO workaround */
 static void io_workaround_init(void)