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 <[email protected]> Signed-off-by: Theodore Ts'o <[email protected]>
jljusten · Jul 24, 2012 · d114a33 · d114a33
1 parent cbc96b7
commit d114a33
Showing 1 changed file with 3 additions and 0 deletions.
diff --git 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;
 }