Ian Abbott e9166139f6 staging: comedi: complain if dma buffer allocation not supported
When allocating a buffer to support asynchronous comedi commands, if a
DMA coherent buffer was requested but `CONFIG_HAS_DMA` is undefined,
bail out of local helper function `__comedi_buf_alloc()` with an error
message.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-05-13 17:38:48 -04:00
..
2013-05-13 17:38:46 -04:00
2013-05-05 00:15:43 -04:00
2010-06-17 13:49:07 -07:00