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Subject[v2.6.34-stable 165/165] dmi: Feed DMI table to /dev/random driver
Date
From: Tony Luck <tony.luck@intel.com>

-------------------
This is a commit scheduled for the next v2.6.34 longterm release.
http://git.kernel.org/?p=linux/kernel/git/paulg/longterm-queue-2.6.34.git
If you see a problem with using this for longterm, please comment.
-------------------

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>
---
drivers/firmware/dmi_scan.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index d464672..1816d92 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;
}
--
1.7.12.rc2


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