diff options
| author |   Simon Arlott <simon@fire.lp0.eu> | 2009-11-21 15:33:51 +0000 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-02 14:52:58 -0800 |
| commit | 9fc950d322380dda8e9bc8debe89766085e7a0eb (patch) | |
| tree | 50449ddbcc2cf883da8afe7ecfd1861c2441624f /drivers/usb/atm/usbatm.c | |
| parent | USB: cxacru: check data length is not negative (diff) | |
| download | linux-dev-9fc950d322380dda8e9bc8debe89766085e7a0eb.tar.xz linux-dev-9fc950d322380dda8e9bc8debe89766085e7a0eb.zip | |
USB: cxacru: check device isn't being removed during sysfs calls
It is possible for usb_get_intfdata() to return NULL if
sysfs is accessed while the module is being unloaded or
the device is being removed.
Move the access code to an inline function in usbatm.h,
and return -ENODEV if any of the pointers are NULL.
It should not be possible for the instance data or atm
device to be invalid until after unbind() completes and
the sysfs attributes have been removed.
Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/atm/usbatm.c')
| -rw-r--r-- | drivers/usb/atm/usbatm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c index fbea8563df1e..40380434ba96 100644 --- a/drivers/usb/atm/usbatm.c +++ b/drivers/usb/atm/usbatm.c @@ -1333,6 +1333,7 @@ void usbatm_usb_disconnect(struct usb_interface *intf) if (instance->atm_dev) { sysfs_remove_link(&instance->atm_dev->class_dev.kobj, "device"); atm_dev_deregister(instance->atm_dev); + instance->atm_dev = NULL; } usbatm_put_instance(instance); /* taken in usbatm_usb_probe */ |