linux-kernel - [ 180/180] dmi: Feed DMI table to /dev/random driver

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Date:	Tue, 02 Oct 2012 00:54:57 +0200
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Tony Luck <tony.luck@...el.com>, Theodore Tso <tytso@....edu>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Willy Tarreau <w@....eu>
Subject: [ 180/180] dmi: Feed DMI table to /dev/random driver

2.6.32-longterm review patch.  If anyone has any objections, please let me know.

------------------

From: Tony Luck <tony.luck@...el.com>

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@...el.com>
Signed-off-by: Theodore Ts'o <tytso@....edu>
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/firmware/dmi_scan.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index 3a2ccb0..10a4246 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -6,6 +6,7 @@
 #include <linux/efi.h>
 #include <linux/bootmem.h>
 #include <linux/slab.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;
 }
-- 
1.7.2.1.45.g54fbc



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