[PATCH net-next v2 2/3] net: pcs: rzn1-miic: Fix miic register initialization loop

[Kyle Hendry via B4 Relay <devnull+khendry.reliablecontrols.com@kernel.org>]

From: Kyle Hendry <khendry@reliablecontrols.com>

The function to write default values to miic registers was looping from
zero to miic_port_max, which might not cover all ports depending on SoC
numbering. Determine the port count from SoC data and loop over that.

Fixes: c112520de041758e ("net: pcs: rzn1-miic: move port range handling into SoC data")
Signed-off-by: Kyle Hendry <khendry@reliablecontrols.com>
---
 drivers/net/pcs/pcs-rzn1-miic.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/pcs/pcs-rzn1-miic.c b/drivers/net/pcs/pcs-rzn1-miic.c
index df70309c2d97..9e830932ce49 100644
--- a/drivers/net/pcs/pcs-rzn1-miic.c
+++ b/drivers/net/pcs/pcs-rzn1-miic.c
@@ -520,6 +520,7 @@ EXPORT_SYMBOL(miic_destroy);
 static int miic_init_hw(struct miic *miic, u32 cfg_mode)
 {
 	u8 sw_mode_mask = miic->of_data->sw_mode_mask;
+	int num_ports;
 	int port;
 
 	/* Unlock write access to accessory registers (cf datasheet). If this
@@ -535,7 +536,10 @@ static int miic_init_hw(struct miic *miic, u32 cfg_mode)
 	miic_reg_writel(miic, MIIC_MODCTRL,
 			((cfg_mode << __ffs(sw_mode_mask)) & sw_mode_mask));
 
-	for (port = 0; port < miic->of_data->miic_port_max; port++) {
+	num_ports = miic->of_data->miic_port_max -
+		miic->of_data->miic_port_start + 1;
+
+	for (port = 0; port < num_ports; port++) {
 		miic_converter_enable(miic, port, 0);
 		/* Disable speed/duplex control from these registers, datasheet
 		 * says switch registers should be used to setup switch port

-- 
2.43.0