tree 50449ddbcc2cf883da8afe7ecfd1861c2441624f
parent 5d0a9c7932c45435de72b5a5b2825c7eb34186a4
author Simon Arlott <simon@fire.lp0.eu> 1258817631 +0000
committer Greg Kroah-Hartman <gregkh@suse.de> 1267570378 -0800

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>