On Fri, Jun 14, 2019 at 03:47:22PM +0200, Christoph Hellwig wrote: > comedi_buf.c abuse the DMA API in gravely broken ways, as it assumes it > can call virt_to_page on the result, and the just remap it as uncached > using vmap. Disable the driver until this API abuse has been fixed. > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> > --- > drivers/staging/comedi/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/staging/comedi/Kconfig b/drivers/staging/comedi/Kconfig > index 049b659fa6ad..e7c021d76cfa 100644 > --- a/drivers/staging/comedi/Kconfig > +++ b/drivers/staging/comedi/Kconfig > @@ -1,6 +1,7 @@ > # SPDX-License-Identifier: GPL-2.0 > config COMEDI > tristate "Data acquisition support (comedi)" > + depends on BROKEN Um, that's a huge sledgehammer. Perhaps a hint as to how we can fix this up? This is the first time I've heard of the comedi code not handling dma properly. thanks, greg k-h
