[PATCH v2 16/24] net: stmmac: Use optional reset control API to work with stmmaceth

[Serge Semin <Sergey.Semin@baikalelectronics.ru>]

Since commit bb3222f71b57 ("net: stmmac: platform: use optional clk/reset
get APIs") a manual implementation of the optional device reset control
functionality has been replaced with using the
devm_reset_control_get_optional() method. But for some reason the optional
reset control handler usage hasn't been fixed and preserved the
NULL-checking statements. There is no need in that in order to perform the
reset control assertion/deassertion because the passed NULL will be
considered by the reset framework as absent optional reset control handler
anyway.

Fixes: bb3222f71b57 ("net: stmmac: platform: use optional clk/reset get APIs")
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
---
 .../net/ethernet/stmicro/stmmac/stmmac_main.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 4f1bf8f6538b..a8dec219c295 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4935,15 +4935,13 @@ int stmmac_dvr_probe(struct device *device,
 	if ((phyaddr >= 0) && (phyaddr <= 31))
 		priv->plat->phy_addr = phyaddr;
 
-	if (priv->plat->stmmac_rst) {
-		ret = reset_control_assert(priv->plat->stmmac_rst);
-		reset_control_deassert(priv->plat->stmmac_rst);
-		/* Some reset controllers have only reset callback instead of
-		 * assert + deassert callbacks pair.
-		 */
-		if (ret == -ENOTSUPP)
-			reset_control_reset(priv->plat->stmmac_rst);
-	}
+	ret = reset_control_assert(priv->plat->stmmac_rst);
+	reset_control_deassert(priv->plat->stmmac_rst);
+	/* Some reset controllers have only reset callback instead of
+	 * assert + deassert callbacks pair.
+	 */
+	if (ret == -ENOTSUPP)
+		reset_control_reset(priv->plat->stmmac_rst);
 
 	/* Init MAC and get the capabilities */
 	ret = stmmac_hw_init(priv);
@@ -5155,8 +5153,7 @@ int stmmac_dvr_remove(struct device *dev)
 	stmmac_exit_fs(ndev);
 #endif
 	phylink_destroy(priv->phylink);
-	if (priv->plat->stmmac_rst)
-		reset_control_assert(priv->plat->stmmac_rst);
+	reset_control_assert(priv->plat->stmmac_rst);
 	if (priv->hw->pcs != STMMAC_PCS_TBI &&
 	    priv->hw->pcs != STMMAC_PCS_RTBI)
 		stmmac_mdio_unregister(ndev);
-- 
2.29.2