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authorLinus Walleij <linus.walleij@linaro.org>2015-06-18 16:46:34 +0200
committerLinus Walleij <linus.walleij@linaro.org>2015-07-17 11:50:22 +0200
commite8a7d2bb93f8b713b0536ef6f86b745b288fa96f (patch)
tree8e0dfb1c48e36da033ebd074907ace98b2c00bb6 /arch/arm/mach-ep93xx
parentb8824c9a54bb380367541718b50f03cb08524c8d (diff)
downloadlinux-e8a7d2bb93f8b713b0536ef6f86b745b288fa96f.tar.bz2
ARM: ep93xx: toss the device ID into the entropy pool
It doesn't hurt to add this random stuff into the entropy pool as is custom to do with device-unique numbers. Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'arch/arm/mach-ep93xx')
-rw-r--r--arch/arm/mach-ep93xx/core.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 5e2151bcc0c5..c393b1b0310d 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -37,6 +37,7 @@
#include <linux/irqchip/arm-vic.h>
#include <linux/reboot.h>
#include <linux/usb/ohci_pdriver.h>
+#include <linux/random.h>
#include <mach/hardware.h>
#include <linux/platform_data/video-ep93xx.h>
@@ -862,6 +863,12 @@ static const char __init *ep93xx_get_soc_id(void)
if (id != id2)
return "invalid";
+ /* Toss the unique ID into the entropy pool */
+ add_device_randomness(&id2, 4);
+ add_device_randomness(&id3, 4);
+ add_device_randomness(&id4, 4);
+ add_device_randomness(&id5, 4);
+
snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id),
"%08x%08x%08x%08x", id2, id3, id4, id5);