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: v2.6.34.13~1
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=201095fcd2b848cd22711f9a58d1ffd0c9f3e458;p=karo-tx-linux.git

dmi: Feed DMI table to /dev/random driver

commit d114a33387472555188f142ed8e98acdb8181c6d upstream.

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>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---

diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index d46467271349..1816d928f741 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -5,6 +5,7 @@
 #include <linux/dmi.h>
 #include <linux/efi.h>
 #include <linux/bootmem.h>
+#include <linux/random.h>
 #include <asm/dmi.h>
 
 /*
@@ -110,6 +111,8 @@ 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;
 }