From: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Date: Thu, 2 Jul 2020 12:44:50 +0300
Subject: net: dsa: microchip: set the correct number of ports
Git-commit: af199a1a9cb02ec0194804bd46c174b6db262075
Patch-mainline: 5.8-rc5
References: networking-stable-20_07_17
The number of ports is incorrectly set to the maximum available for a DSA
switch. Even if the extra ports are not used, this causes some functions
to be called later, like port_disable() and port_stp_state_set(). If the
driver doesn't check the port index, it will end up modifying unknown
registers.
[js] no ksz8795 in 5.3 yet.
Fixes: b987e98e50ab ("dsa: add DSA switch driver for Microchip KSZ9477")
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/net/dsa/microchip/ksz9477.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -1579,6 +1579,9 @@ static int ksz9477_switch_init(struct ks
return -ENOMEM;
}
+ /* set the real number of ports */
+ dev->ds->num_ports = dev->port_cnt;
+
return 0;
}