linux-kernel - [PATCH 4.9 07/90] net: macsec: update SCI upon MAC address change.

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Date:   Thu, 19 Mar 2020 13:59:29 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dmitry Bogdanov <dbogdanov@...vell.com>,
        Mark Starovoytov <mstarovoitov@...vell.com>,
        Igor Russkikh <irusskikh@...vell.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.9 07/90] net: macsec: update SCI upon MAC address change.

From: Dmitry Bogdanov <dbogdanov@...vell.com>

[ Upstream commit 6fc498bc82929ee23aa2f35a828c6178dfd3f823 ]

SCI should be updated, because it contains MAC in its first 6 octets.

Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver")
Signed-off-by: Dmitry Bogdanov <dbogdanov@...vell.com>
Signed-off-by: Mark Starovoytov <mstarovoitov@...vell.com>
Signed-off-by: Igor Russkikh <irusskikh@...vell.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/macsec.c |   11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -2871,6 +2871,11 @@ static void macsec_dev_set_rx_mode(struc
 	dev_uc_sync(real_dev, dev);
 }
 
+static sci_t dev_to_sci(struct net_device *dev, __be16 port)
+{
+	return make_sci(dev->dev_addr, port);
+}
+
 static int macsec_set_mac_address(struct net_device *dev, void *p)
 {
 	struct macsec_dev *macsec = macsec_priv(dev);
@@ -2892,6 +2897,7 @@ static int macsec_set_mac_address(struct
 
 out:
 	ether_addr_copy(dev->dev_addr, addr->sa_data);
+	macsec->secy.sci = dev_to_sci(dev, MACSEC_PORT_ES);
 	return 0;
 }
 
@@ -3160,11 +3166,6 @@ static bool sci_exists(struct net_device
 	return false;
 }
 
-static sci_t dev_to_sci(struct net_device *dev, __be16 port)
-{
-	return make_sci(dev->dev_addr, port);
-}
-
 static int macsec_add_dev(struct net_device *dev, sci_t sci, u8 icv_len)
 {
 	struct macsec_dev *macsec = macsec_priv(dev);