thunderbolt: Use pseudo-random number as initial property block generation

As recommended by USB4 inter-domain service spec use pseudo-random value
instead of zero as initial XDomain property block generation value.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c
index a165766..cfe6fa7 100644 (file)
--- a/drivers/thunderbolt/xdomain.c
+++ b/drivers/thunderbolt/xdomain.c
@@ -12,6 +12,7 @@
 #include <linux/kmod.h>
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
+#include <linux/prandom.h>
 #include <linux/utsname.h>
 #include <linux/uuid.h>
 #include <linux/workqueue.h>
@@ -1880,6 +1881,7 @@ int tb_xdomain_init(void)
        tb_property_add_immediate(xdomain_property_dir, "deviceid", 0x1);
        tb_property_add_immediate(xdomain_property_dir, "devicerv", 0x80000100);
 
+       xdomain_property_block_gen = prandom_u32();
        return 0;
 }