linux-kernel - [PATCH 10/14] phy: meson8b-usb2: simplify optional reset handling

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Date:   Mon, 30 Jan 2017 12:41:12 +0100
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     linux-arm-kernel@...ts.infradead.org,
        Ramiro Oliveira <Ramiro.Oliveira@...opsys.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Kevin Hilman <khilman@...libre.com>,
        Carlo Caione <carlo@...one.org>,
        Kishon Vijay Abraham I <kishon@...com>
Subject: [PATCH 10/14] phy: meson8b-usb2: simplify optional reset handling

As of commit bb475230b8e5 ("reset: make optional functions really
optional"), the reset framework API calls use NULL pointers to describe
optional, non-present reset controls.

This allows to return errors from devm_reset_control_get_optional_shared
and to call reset_control_reset unconditionally.

Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
Cc: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc: Kevin Hilman <khilman@...libre.com>
Cc: Carlo Caione <carlo@...one.org>
Cc: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/phy/phy-meson8b-usb2.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/phy/phy-meson8b-usb2.c b/drivers/phy/phy-meson8b-usb2.c
index 33c9f4ba157d1..87168f1fe3af6 100644
--- a/drivers/phy/phy-meson8b-usb2.c
+++ b/drivers/phy/phy-meson8b-usb2.c
@@ -141,12 +141,10 @@ static int phy_meson8b_usb2_power_on(struct phy *phy)
 	struct phy_meson8b_usb2_priv *priv = phy_get_drvdata(phy);
 	int ret;
 
-	if (!IS_ERR_OR_NULL(priv->reset)) {
-		ret = reset_control_reset(priv->reset);
-		if (ret) {
-			dev_err(&phy->dev, "Failed to trigger USB reset\n");
-			return ret;
-		}
+	ret = reset_control_reset(priv->reset);
+	if (ret) {
+		dev_err(&phy->dev, "Failed to trigger USB reset\n");
+		return ret;
 	}
 
 	ret = clk_prepare_enable(priv->clk_usb_general);
@@ -241,7 +239,7 @@ static int phy_meson8b_usb2_probe(struct platform_device *pdev)
 		return PTR_ERR(priv->clk_usb);
 
 	priv->reset = devm_reset_control_get_optional_shared(&pdev->dev, NULL);
-	if (PTR_ERR(priv->reset) == -EPROBE_DEFER)
+	if (PTR_ERR(priv->reset))
 		return PTR_ERR(priv->reset);
 
 	priv->dr_mode = of_usb_get_dr_mode_by_phy(pdev->dev.of_node, -1);
-- 
2.11.0