From: Roger Quadros <rogerq@ti.com>
Date: Thu, 10 Jul 2014 06:25:02 +0000 (+0530)
Subject: phy: core: Fix error path in phy_create()
X-Git-Tag: v4.9.8~6111^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e73b49f1c4e75c44d62585cc3e5b9c7894b61c32;p=platform%2Fkernel%2Flinux-rpi3.git

phy: core: Fix error path in phy_create()

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.

Cc: 3.13+ <stable@vger.kernel.org> # 3.13+
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index c64a2f3..49c4465 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -614,8 +614,9 @@ struct phy *phy_create(struct device *dev, const struct phy_ops *ops,
 	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);
@@ -799,7 +800,7 @@ static void phy_release(struct device *dev)
 
 	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);
 }