powerpc: Disable /dev/port interface on systems without an ISA bridge

[firefly-linux-kernel-4.4.55.git] / arch / powerpc / include / asm / io.h

diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index a3855b81eada2ed893a6d272198e6add4b85752e..f94ef4213e9d03f80e1c0f180ea9a75d966358ad 100644 (file)
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -20,6 +20,14 @@ extern int check_legacy_ioport(unsigned long base_port);
 #define _PNPWRP                0xa79
 #define PNPBIOS_BASE   0xf000
 
+#if defined(CONFIG_PPC64) && defined(CONFIG_PCI)
+extern struct pci_dev *isa_bridge_pcidev;
+/*
+ * has legacy ISA devices ?
+ */
+#define arch_has_dev_port()    (isa_bridge_pcidev != NULL)
+#endif
+
 #include <linux/device.h>
 #include <linux/io.h>