linux-kernel - [PATCH v2] phy: core: Check requested PHY status in _of_phy

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Date:	Tue, 07 Apr 2015 12:23:38 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Kishon Vijay Abraham I <kishon@...com>
Cc:	Gabriel FERNANDEZ <gabriel.fernandez@...com>,
	Lee Jones <lee.jones@...aro.org>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] phy: core: Check requested PHY status in _of_phy_get()

This is a common checking in various drivers, so move the checking to
_of_phy_get().

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
v2: Fixup the error patch. It needs to call module_put if Requested PHY is
    disabled.
 drivers/phy/phy-core.c      | 12 ++++++++++--
 drivers/phy/phy-miphy28lp.c |  5 -----
 drivers/phy/phy-miphy365x.c |  5 -----
 drivers/phy/phy-rcar-gen2.c |  5 -----
 4 files changed, 10 insertions(+), 17 deletions(-)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 3791838f..f7403de 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -367,13 +367,21 @@ static struct phy *_of_phy_get(struct device_node *np, int index)
 	phy_provider = of_phy_provider_lookup(args.np);
 	if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) {
 		phy = ERR_PTR(-EPROBE_DEFER);
-		goto err0;
+		goto out_unlock;
+	}
+
+	if (!of_device_is_available(args.np)) {
+		dev_warn(phy_provider->dev, "Requested PHY is disabled\n");
+		phy = ERR_PTR(-ENODEV);
+		goto out_put_module;
 	}
 
 	phy = phy_provider->of_xlate(phy_provider->dev, &args);
+
+out_put_module:
 	module_put(phy_provider->owner);
 
-err0:
+out_unlock:
 	mutex_unlock(&phy_provider_mutex);
 	of_node_put(args.np);
 
diff --git a/drivers/phy/phy-miphy28lp.c b/drivers/phy/phy-miphy28lp.c
index 9334352..cc87b3f 100644
--- a/drivers/phy/phy-miphy28lp.c
+++ b/drivers/phy/phy-miphy28lp.c
@@ -1107,11 +1107,6 @@ static struct phy *miphy28lp_xlate(struct device *dev,
 	struct device_node *phynode = args->np;
 	int ret, index = 0;
 
-	if (!of_device_is_available(phynode)) {
-		dev_warn(dev, "Requested PHY is disabled\n");
-		return ERR_PTR(-ENODEV);
-	}
-
 	if (args->args_count != 1) {
 		dev_err(dev, "Invalid number of cells in 'phy' property\n");
 		return ERR_PTR(-EINVAL);
diff --git a/drivers/phy/phy-miphy365x.c b/drivers/phy/phy-miphy365x.c
index 51b459d..d29b332 100644
--- a/drivers/phy/phy-miphy365x.c
+++ b/drivers/phy/phy-miphy365x.c
@@ -476,11 +476,6 @@ static struct phy *miphy365x_xlate(struct device *dev,
 	struct device_node *phynode = args->np;
 	int ret, index;
 
-	if (!of_device_is_available(phynode)) {
-		dev_warn(dev, "Requested PHY is disabled\n");
-		return ERR_PTR(-ENODEV);
-	}
-
 	if (args->args_count != 1) {
 		dev_err(dev, "Invalid number of cells in 'phy' property\n");
 		return ERR_PTR(-EINVAL);
diff --git a/drivers/phy/phy-rcar-gen2.c b/drivers/phy/phy-rcar-gen2.c
index 778276a..f47bfd8 100644
--- a/drivers/phy/phy-rcar-gen2.c
+++ b/drivers/phy/phy-rcar-gen2.c
@@ -206,11 +206,6 @@ static struct phy *rcar_gen2_phy_xlate(struct device *dev,
 	struct device_node *np = args->np;
 	int i;
 
-	if (!of_device_is_available(np)) {
-		dev_warn(dev, "Requested PHY is disabled\n");
-		return ERR_PTR(-ENODEV);
-	}
-
 	drv = dev_get_drvdata(dev);
 	if (!drv)
 		return ERR_PTR(-EINVAL);
-- 
1.9.1



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