]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/commit
staging: comedi: comedi_fops: introduce __comedi_get_user_cmd()
authorH Hartley Sweeten <hsweeten@visionengravers.com>
Thu, 6 Mar 2014 19:02:56 +0000 (12:02 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 17 Mar 2014 19:27:58 +0000 (12:27 -0700)
commit87ece583310d47bcf0027e4a77c990bbb010fc5e
treee8aed983ae2667bde03377a95b6eaa91d9bbcd2b
parenta11f5d2b2b37fcc5a06e9149686a85f3148f4190
staging: comedi: comedi_fops: introduce __comedi_get_user_cmd()

The COMEDI_CMD and COMEDI_CMDTEST ioctl functions both copy the
comedi_cmd passed by the user from __user memory space to kernel
memory space. They then do some basic sanity checking of the cmd
before the subdevice (*do_cmdtest) and (*do_cmd) operations are
called.

Introduce a helper function to handle the copy_from_user() and
do the basic sanity checking.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/staging/comedi/comedi_fops.c