x86/devicetree: Initialize device tree before using it

Commit 08d53aa58cb1 added CRC32 calculation in early_init_dt_verify() and
checking in late initcall of_fdt_raw_init(), making early_init_dt_verify()
mandatory.

The required call to early_init_dt_verify() was not added to the
x86-specific implementation, causing failure to create the sysfs entry in
of_fdt_raw_init().

Fixes: 08d53aa58cb1 ("of/fdt: export fdt blob as /sys/firmware/fdt")
Signed-off-by: Ivan Gorinov <ivan.gorinov@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Link: https://lkml.kernel.org/r/c8c7e941efc63b5d25ebf9b6350b0f3df38f6098.1520450752.git.ivan.gorinov@intel.com

1 files changed, 5 insertions, 3 deletions

diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index 25de5f6ca997..63d2ebc21825 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -11,6 +11,7 @@
 #include <linux/of_address.h>
 #include <linux/of_platform.h>
 #include <linux/of_irq.h>
+#include <linux/libfdt.h>
 #include <linux/slab.h>
 #include <linux/pci.h>
 #include <linux/of_pci.h>
@@ -270,14 +271,15 @@ static void __init x86_flattree_get_config(void)
 
         map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
 
-        initial_boot_params = dt = early_memremap(initial_dtb, map_len);
-        size = of_get_flat_dt_size();
+        dt = early_memremap(initial_dtb, map_len);
+        size = fdt_totalsize(dt);
         if (map_len < size) {
                 early_memunmap(dt, map_len);
-                initial_boot_params = dt = early_memremap(initial_dtb, size);
+                dt = early_memremap(initial_dtb, size);
                 map_len = size;
         }
 
+        early_init_dt_verify(dt);
         unflatten_and_copy_device_tree();
         early_memunmap(dt, map_len);
 }