linux-kernel - [PATCH 3.14 32/66] phy: core: Fix error path in phy

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Message-Id: <20140715231703.505981387@linuxfoundation.org>
Date:	Tue, 15 Jul 2014 16:17:26 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Roger Quadros <rogerq@...com>,
	Kishon Vijay Abraham I <kishon@...com>
Subject: [PATCH 3.14 32/66] phy: core: Fix error path in phy_create()

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Roger Quadros <rogerq@...com>

commit e73b49f1c4e75c44d62585cc3e5b9c7894b61c32 upstream.

Prevent resources from being freed twice in case device_add() call
fails within phy_create(). Also use ida_simple_remove() instead of
ida_remove() as we had used ida_simple_get() to allocate the ida.

Signed-off-by: Roger Quadros <rogerq@...com>
Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/phy/phy-core.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -553,8 +553,9 @@ struct phy *phy_create(struct device *de
 	return phy;
 
 put_dev:
-	put_device(&phy->dev);
-	ida_remove(&phy_ida, phy->id);
+	put_device(&phy->dev);  /* calls phy_release() which frees resources */
+	return ERR_PTR(ret);
+
 free_phy:
 	kfree(phy);
 	return ERR_PTR(ret);
@@ -738,7 +739,7 @@ static void phy_release(struct device *d
 
 	phy = to_phy(dev);
 	dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
-	ida_remove(&phy_ida, phy->id);
+	ida_simple_remove(&phy_ida, phy->id);
 	kfree(phy);
 }
 


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