netdev - [PATCH 07/18] thunderbolt: Use pseudo-random number as initial property block generation

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Message-Id: <20210304123125.43630-8-mika.westerberg@linux.intel.com>
Date:   Thu,  4 Mar 2021 15:31:14 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     linux-usb@...r.kernel.org
Cc:     Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        Andreas Noever <andreas.noever@...il.com>,
        Isaac Hazan <isaac.hazan@...el.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Lukas Wunner <lukas@...ner.de>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org
Subject: [PATCH 07/18] 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@...ux.intel.com>
---
 drivers/thunderbolt/xdomain.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c
index a1657663a95e..cfe6fa7e84f4 100644
--- 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;
 }
 
-- 
2.30.1