[PATCH] iscsi_ibft: Fix isa_bus_to_virt not working under ARM

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

The isa_bus_to_virt is only needed under X86 and in fact the code
that sets the ibft_phys_addr is only compiled under X86.

As such lets just ifdef the code.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Vijayendra Suman <vijayendra.suman@oracle.com>
CC: Maurizio Lombardi <mlombard@redhat.com>
CC: Mike Rapoport <rppt@kernel.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/firmware/iscsi_ibft.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/drivers/firmware/iscsi_ibft.c b/drivers/firmware/iscsi_ibft.c
index 612a59e213df..7cde1a7a3ab1 100644
--- a/drivers/firmware/iscsi_ibft.c
+++ b/drivers/firmware/iscsi_ibft.c
@@ -86,7 +86,7 @@ MODULE_VERSION(IBFT_ISCSI_VERSION);
 
 static struct acpi_table_ibft *ibft_addr;
 
-#ifndef CONFIG_ISCSI_IBFT_FIND
+#ifdef CONFIG_ISCSI_IBFT_FIND
 phys_addr_t ibft_phys_addr;
 #endif
 
@@ -851,7 +851,21 @@ static void __init acpi_find_ibft_region(void)
 {
 }
 #endif
-
+#ifdef CONFIG_ISCSI_IBFT_FIND
+static int __init acpi_find_isa_region(void)
+{
+	if (ibft_phys_addr) {
+		ibft_addr = isa_bus_to_virt(ibft_phys_addr);
+		return 0;
+	}
+	return -ENODEV;
+}
+#else
+static int __init acpi_find_isa_region(void)
+{
+	return -ENODEV;
+}
+#endif
 /*
  * ibft_init() - creates sysfs tree entries for the iBFT data.
  */
@@ -864,9 +878,7 @@ static int __init ibft_init(void)
 	   is called before ACPI tables are parsed and it only does
 	   legacy finding.
 	*/
-	if (ibft_phys_addr)
-		ibft_addr = isa_bus_to_virt(ibft_phys_addr);
-	else
+	if (acpi_find_isa_region())
 		acpi_find_ibft_region();
 
 	if (ibft_addr) {
-- 
2.27.0