linux-kernel - [PATCH 5.8 51/56] net: dsa: microchip: ksz8795: really set the correct number of ports

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Date:   Fri, 25 Sep 2020 14:48:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>,
        Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 5.8 51/56] net: dsa: microchip: ksz8795: really set the correct number of ports

From: Matthias Schiffer <matthias.schiffer@...tq-group.com>

[ Upstream commit fd944dc24336922656a48f4608bfb41abdcdc4aa ]

The KSZ9477 and KSZ8795 use the port_cnt field differently: For the
KSZ9477, it includes the CPU port(s), while for the KSZ8795, it doesn't.

It would be a good cleanup to make the handling of both drivers match,
but as a first step, fix the recently broken assignment of num_ports in
the KSZ8795 driver (which completely broke probing, as the CPU port
index was always failing the num_ports check).

Fixes: af199a1a9cb0 ("net: dsa: microchip: set the correct number of ports")
Signed-off-by: Matthias Schiffer <matthias.schiffer@...tq-group.com>
Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/dsa/microchip/ksz8795.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -1269,7 +1269,7 @@ static int ksz8795_switch_init(struct ks
 	}
 
 	/* set the real number of ports */
-	dev->ds->num_ports = dev->port_cnt;
+	dev->ds->num_ports = dev->port_cnt + 1;
 
 	return 0;
 }