net: stmmac: dwmac-stm32: update err status in case different of stm32mp13

The mask parameter of syscfg property is mandatory for MP13 but
optional for all other cases.
The function should not return error code because for non-MP13
the missing syscfg phandle in DT is not considered an error.
So reset err to 0 in that case to support existing DTs without
syscfg phandle.

Fixes: 50bbc0393114 ("net: stmmac: dwmac-stm32: add management of stm32mp13 for stm32")
Signed-off-by: Christophe Roullier <christophe.roullier@foss.st.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Tested-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
index d6a268237ca168d01a79b9ed8afd400abb307282..c1732955a697ed7a314e78b020fb19bc6240c8ec 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
@@ -435,10 +435,12 @@ static int stm32_dwmac_parse_data(struct stm32_dwmac *dwmac,
        dwmac->mode_mask = SYSCFG_MP1_ETH_MASK;
        err = of_property_read_u32_index(np, "st,syscon", 2, &dwmac->mode_mask);
        if (err) {
-               if (dwmac->ops->is_mp13)
+               if (dwmac->ops->is_mp13) {
                        dev_err(dev, "Sysconfig register mask must be set (%d)\n", err);
-               else
+               } else {
                        dev_dbg(dev, "Warning sysconfig register mask not set\n");
+                       err = 0;
+               }
        }
 
        return err;