Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 12/13] USB: Core: fix race in device_create | Date | Tue, 20 May 2008 15:34:59 -0700 |
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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().
Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- drivers/usb/core/hcd.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index bf10e9c..09a53e7 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -818,12 +818,12 @@ static int usb_register_bus(struct usb_bus *bus) set_bit (busnum, busmap.busmap); bus->busnum = busnum; - bus->dev = device_create(usb_host_class, bus->controller, MKDEV(0, 0), - "usb_host%d", busnum); + bus->dev = device_create_drvdata(usb_host_class, bus->controller, + MKDEV(0, 0), bus, + "usb_host%d", busnum); result = PTR_ERR(bus->dev); if (IS_ERR(bus->dev)) goto error_create_class_dev; - dev_set_drvdata(bus->dev, bus); /* Add it to the local list of buses */ list_add (&bus->bus_list, &usb_bus_list); -- 1.5.5.1
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