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| author | Greg Kroah-Hartman <gregkh@suse.de> | 2008-05-16 17:55:12 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-05-20 13:31:56 -0700 |
| commit | c5fb920aec2090a44aa4c33546b9f3c3affa538c (patch) | |
| tree | 0a01838910d8fc227067facd55c7c1629182cf6d | |
| parent | 5d99a8b814abd76e89ef2cf90e29bbb879d6d66c (diff) | |
| download | linux-stable-c5fb920aec2090a44aa4c33546b9f3c3affa538c.tar.gz linux-stable-c5fb920aec2090a44aa4c33546b9f3c3affa538c.tar.bz2 linux-stable-c5fb920aec2090a44aa4c33546b9f3c3affa538c.zip | |
s390: fix race in device_create
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: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/s390/char/vmlogrdr.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/s390/char/vmlogrdr.c b/drivers/s390/char/vmlogrdr.c index e8487347e4d4..2c2428cc05d8 100644 --- a/drivers/s390/char/vmlogrdr.c +++ b/drivers/s390/char/vmlogrdr.c @@ -762,10 +762,10 @@ static int vmlogrdr_register_device(struct vmlogrdr_priv_t *priv) device_unregister(dev); return ret; } - priv->class_device = device_create(vmlogrdr_class, dev, - MKDEV(vmlogrdr_major, - priv->minor_num), - "%s", dev->bus_id); + priv->class_device = device_create_drvdata(vmlogrdr_class, dev, + MKDEV(vmlogrdr_major, + priv->minor_num), + priv, "%s", dev->bus_id); if (IS_ERR(priv->class_device)) { ret = PTR_ERR(priv->class_device); priv->class_device=NULL; @@ -773,7 +773,6 @@ static int vmlogrdr_register_device(struct vmlogrdr_priv_t *priv) device_unregister(dev); return ret; } - dev->driver_data = priv; priv->device = dev; return 0; } |