staging/comedi: fix build for USB not enabled
authorRandy Dunlap <rdunlap@xenotime.net>
Mon, 11 Jun 2012 23:35:50 +0000 (16:35 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 11 Jun 2012 23:49:35 +0000 (16:49 -0700)
commit78b10615ad295393a7d66ea57218171c0a07c059
tree5f5654b78d6af51d2d38baa498ad6652cf6fb74e
parentafb6a6a01b51b6712485ea045e2b882061d250d9
staging/comedi: fix build for USB not enabled

Calls to optional subsystems cannot be made indiscriminately.
Enclose all of the usb helper functions inside
#if IS_ENABLED(CONFIG_USB)
to fix these build errors.

(The pci helper functions are OK since there are stubs in
linux/pci.h for the called functions when PCI is not enabled.
Possibly the same could be done for the called USB functions.)

ERROR: "usb_deregister" [drivers/staging/comedi/comedi.ko] undefined!
ERROR: "usb_register_driver" [drivers/staging/comedi/comedi.ko] undefined!

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/comedi/drivers.c