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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 | 24b42566c3fcbb5a9011d1446783d0f5844ccd45 (patch) | |
| tree | 0e1de28631d02446580adf5fbb98feb981b20b5a /drivers/scsi/ch.c | |
| parent | c013d040b70bc2bff5465917ebb255a70b650396 (diff) | |
| download | blackbird-op-linux-24b42566c3fcbb5a9011d1446783d0f5844ccd45.tar.gz blackbird-op-linux-24b42566c3fcbb5a9011d1446783d0f5844ccd45.zip | |
SCSI: 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(). It fixes the problem in all of the scsi
drivers that need it.
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Doug Gilbert <dgilbert@interlog.com>
Cc: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/scsi/ch.c')
| -rw-r--r-- | drivers/scsi/ch.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c index 75c84d7b9ce8..c4b938bc30d3 100644 --- a/drivers/scsi/ch.c +++ b/drivers/scsi/ch.c @@ -910,9 +910,9 @@ static int ch_probe(struct device *dev) ch->minor = minor; sprintf(ch->name,"ch%d",ch->minor); - class_dev = device_create(ch_sysfs_class, dev, - MKDEV(SCSI_CHANGER_MAJOR,ch->minor), - "s%s", ch->name); + class_dev = device_create_drvdata(ch_sysfs_class, dev, + MKDEV(SCSI_CHANGER_MAJOR, ch->minor), + ch, "s%s", ch->name); if (IS_ERR(class_dev)) { printk(KERN_WARNING "ch%d: device_create failed\n", ch->minor); @@ -926,7 +926,6 @@ static int ch_probe(struct device *dev) if (init) ch_init_elem(ch); - dev_set_drvdata(dev, ch); sdev_printk(KERN_INFO, sd, "Attached scsi changer %s\n", ch->name); return 0; |
