linux-kernel - [PATCH v2 4/4] USB: PHY: tegra: Call tegra_usb_phy

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Date:	Fri,  4 Jul 2014 04:09:39 +0300
From:	Tuomas Tynkkynen <ttynkkynen@...dia.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Felipe Balbi <balbi@...com>, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
	Tuomas Tynkkynen <ttynkkynen@...dia.com>
Subject: [PATCH v2 4/4] USB: PHY: tegra: Call tegra_usb_phy_close only on device removal

tegra_usb_phy_close() is supposed to undo the effects of
tegra_usb_phy_init(). It is also currently added as the USB PHY shutdown
callback, which is wrong, since tegra_usb_phy_init() is only called
during probing wheras the shutdown callback can get called multiple
times. This then leads to warnings about unbalanced regulator_disable if
the EHCI driver is unbound and bound again at runtime.

Signed-off-by: Tuomas Tynkkynen <ttynkkynen@...dia.com>
---
v2 changes: none
 drivers/usb/phy/phy-tegra-usb.c |    8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c
index bbe4f8e..72e04a9 100644
--- a/drivers/usb/phy/phy-tegra-usb.c
+++ b/drivers/usb/phy/phy-tegra-usb.c
@@ -686,10 +686,8 @@ static int ulpi_phy_power_off(struct tegra_usb_phy *phy)
 	return gpio_direction_output(phy->reset_gpio, 0);
 }
 
-static void tegra_usb_phy_close(struct usb_phy *x)
+static void tegra_usb_phy_close(struct tegra_usb_phy *phy)
 {
-	struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
-
 	if (!IS_ERR(phy->vbus))
 		regulator_disable(phy->vbus);
 
@@ -1061,14 +1059,13 @@ static int tegra_usb_phy_probe(struct platform_device *pdev)
 	if (err < 0)
 		return err;
 
-	tegra_phy->u_phy.shutdown = tegra_usb_phy_close;
 	tegra_phy->u_phy.set_suspend = tegra_usb_phy_suspend;
 
 	platform_set_drvdata(pdev, tegra_phy);
 
 	err = usb_add_phy_dev(&tegra_phy->u_phy);
 	if (err < 0) {
-		tegra_usb_phy_close(&tegra_phy->u_phy);
+		tegra_usb_phy_close(tegra_phy);
 		return err;
 	}
 
@@ -1080,6 +1077,7 @@ static int tegra_usb_phy_remove(struct platform_device *pdev)
 	struct tegra_usb_phy *tegra_phy = platform_get_drvdata(pdev);
 
 	usb_remove_phy(&tegra_phy->u_phy);
+	tegra_usb_phy_close(tegra_phy);
 
 	return 0;
 }
-- 
1.7.9.5

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