From: Tony Luck <tony.luck@intel.com>
Date: Fri, 20 Jul 2012 20:15:20 +0000 (-0700)
Subject: dmi: Feed DMI table to /dev/random driver
X-Git-Tag: upstream/snapshot3+hdmi~6898^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d114a33387472555188f142ed8e98acdb8181c6d;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

dmi: Feed DMI table to /dev/random driver

Send the entire DMI (SMBIOS) table to the /dev/random driver to
help seed its pools.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---

diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index 153980b..b298158 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -6,6 +6,7 @@
 #include <linux/dmi.h>
 #include <linux/efi.h>
 #include <linux/bootmem.h>
+#include <linux/random.h>
 #include <asm/dmi.h>
 
 /*
@@ -111,6 +112,8 @@ static int __init dmi_walk_early(void (*decode)(const struct dmi_header *,
 
 	dmi_table(buf, dmi_len, dmi_num, decode, NULL);
 
+	add_device_randomness(buf, dmi_len);
+
 	dmi_iounmap(buf, dmi_len);
 	return 0;
 }