linux-kernel - [PATCH] Driver core: Fix device_add

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Date:	Thu, 12 Dec 2013 06:11:02 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, Toshi Kani <toshi.kani@...com>
Subject: [PATCH] Driver core: Fix device_add_attrs() error code path

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

If the addition of dev_attr_online fails, device_add_attrs() should
remove device attribute groups as well as type and class attribute
groups before returning an error code.  Make that happen.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/base/core.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-pm/drivers/base/core.c
===================================================================
--- linux-pm.orig/drivers/base/core.c
+++ linux-pm/drivers/base/core.c
@@ -491,11 +491,13 @@ static int device_add_attrs(struct devic
 	if (device_supports_offline(dev) && !dev->offline_disabled) {
 		error = device_create_file(dev, &dev_attr_online);
 		if (error)
-			goto err_remove_type_groups;
+			goto err_remove_dev_groups;
 	}

 	return 0;

+ err_remove_dev_groups:
+ 	device_remove_groups(dev, dev->groups);
  err_remove_type_groups:
 	if (type)
 		device_remove_groups(dev, type->groups);

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