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From:   Brian Masney <bmasney@redhat.com>
To:     irusskikh@marvell.com, davem@davemloft.net, edumazet@google.com,
        kuba@kernel.org, pabeni@redhat.com
Cc:     netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        cth451@gmail.com
Subject: [PATCH] net: atlantic: fix check for invalid ethernet addresses
Date:   Wed, 30 Nov 2022 12:42:59 -0500
Message-Id: <20221130174259.1591567-1-bmasney@redhat.com>
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The Qualcomm sa8540p automotive development board (QDrive3) has an
Aquantia NIC wired over PCIe. The ethernet MAC address assigned to
all of the boards in our lab is 00:17:b6:00:00:00. The existing
check in aq_nic_is_valid_ether_addr() only checks for leading zeros
in the MAC address. Let's update the check to also check for trailing
zeros in the MAC address so that a random MAC address is assigned
in this case.

Signed-off-by: Brian Masney <bmasney@redhat.com>
---
 drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index 06508eebb585..c9c850bbc805 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -293,7 +293,8 @@ static bool aq_nic_is_valid_ether_addr(const u8 *addr)
 	/* Some engineering samples of Aquantia NICs are provisioned with a
 	 * partially populated MAC, which is still invalid.
 	 */
-	return !(addr[0] == 0 && addr[1] == 0 && addr[2] == 0);
+	return !(addr[0] == 0 && addr[1] == 0 && addr[2] == 0) &&
+		!(addr[3] == 0 && addr[4] == 0 && addr[5] == 0);
 }
 
 int aq_nic_ndev_register(struct aq_nic_s *self)
-- 
2.38.1