From: Stefani Seibold Date: Sat, 6 Mar 2010 16:50:14 +0000 (+0100) Subject: driver-core: fix potential race condition in drivers/base/dd.c X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=fbb88fadf7dc2dd6d0d1aa88ff521b2f8552996a;p=deliverable%2Flinux.git driver-core: fix potential race condition in drivers/base/dd.c This patch fix a potential race condition in the driver_bound() function in the file driver/base/dd.c. The broadcast of the BUS_NOTIFY_BOUND_DRIVER notifier should be done after adding the new device to the driver list. Otherwise notifier listener will fail if they use functions like usb_find_interface(). The patch is against kernel 2.6.33. Please merge it. Signed-off-by: Stefani Seibold Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/base/dd.c b/drivers/base/dd.c index c89291f8a16b..503c2620bbcc 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -40,11 +40,11 @@ static void driver_bound(struct device *dev) pr_debug("driver: '%s': %s: bound to device '%s'\n", dev_name(dev), __func__, dev->driver->name); + klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices); + if (dev->bus) blocking_notifier_call_chain(&dev->bus->p->bus_notifier, BUS_NOTIFY_BOUND_DRIVER, dev); - - klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices); } static int driver_sysfs_add(struct device *dev)