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SCSI: fix race in device_create

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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>
This commit is contained in:
Greg Kroah-Hartman
2008-05-16 17:55:12 -07:00
parent c013d040b7
commit 24b42566c3
4 changed files with 17 additions and 16 deletions
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3
drivers/scsi/osst.c
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@@ -5695,13 +5695,12 @@ static int osst_sysfs_add(dev_t dev, struct device *device, struct osst_tape * S
struct device *osst_member;
int err;
osst_member = device_create(osst_sysfs_class, device, dev, "%s", name);
osst_member = device_create_drvdata(osst_sysfs_class, device, dev, STp, "%s", name);
if (IS_ERR(osst_member)) {
printk(KERN_WARNING "osst :W: Unable to add sysfs class member %s\n", name);
return PTR_ERR(osst_member);
}
dev_set_drvdata(osst_member, STp);
err = device_create_file(osst_member, &dev_attr_ADR_rev);
if (err)
goto err_out;