lkml.org 
[lkml]   [2008]   [May]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 07/13] Power Supply: fix race in device_create
Date
There is a race from when a device is created with device_create() and
then the drvdata is set with a call to dev_set_drvdata() in which a
sysfs file could be open, yet the drvdata will be NULL, causing all
sorts of bad things to happen.

This patch fixes the problem by using the new function,
device_create_drvdata().

Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Anton Vorontsov <cbou@mail.ru>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/power/power_supply_core.c | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 138dd76..af1633e 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -91,15 +91,13 @@ int power_supply_register(struct device *parent, struct power_supply *psy)
{
int rc = 0;

- psy->dev = device_create(power_supply_class, parent, 0,
- "%s", psy->name);
+ psy->dev = device_create_drvdata(power_supply_class, parent, 0,
+ psy, "%s", psy->name);
if (IS_ERR(psy->dev)) {
rc = PTR_ERR(psy->dev);
goto dev_create_failed;
}

- dev_set_drvdata(psy->dev, psy);
-
INIT_WORK(&psy->changed_work, power_supply_changed_work);

rc = power_supply_create_attrs(psy);
--
1.5.5.1


\
 
 \ /
  Last update: 2008-05-21 00:41    [W:0.117 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site