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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/st.c | |
| parent | c013d040b70bc2bff5465917ebb255a70b650396 (diff) | |
| download | kernel_samsung_espresso10-24b42566c3fcbb5a9011d1446783d0f5844ccd45.zip kernel_samsung_espresso10-24b42566c3fcbb5a9011d1446783d0f5844ccd45.tar.gz kernel_samsung_espresso10-24b42566c3fcbb5a9011d1446783d0f5844ccd45.tar.bz2 | |
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/st.c')
| -rw-r--r-- | drivers/scsi/st.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index e8db66a..6e5a5bb 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -4424,17 +4424,19 @@ static int do_create_class_files(struct scsi_tape *STp, int dev_num, int mode) snprintf(name, 10, "%s%s%s", rew ? "n" : "", STp->disk->disk_name, st_formats[i]); st_class_member = - device_create(st_sysfs_class, &STp->device->sdev_gendev, - MKDEV(SCSI_TAPE_MAJOR, - TAPE_MINOR(dev_num, mode, rew)), - "%s", name); + device_create_drvdata(st_sysfs_class, + &STp->device->sdev_gendev, + MKDEV(SCSI_TAPE_MAJOR, + TAPE_MINOR(dev_num, + mode, rew)), + &STp->modes[mode], + "%s", name); if (IS_ERR(st_class_member)) { printk(KERN_WARNING "st%d: device_create failed\n", dev_num); error = PTR_ERR(st_class_member); goto out; } - dev_set_drvdata(st_class_member, &STp->modes[mode]); error = device_create_file(st_class_member, &dev_attr_defined); |