diff options
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/comedi/comedi_buf.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/staging/comedi/comedi_buf.c b/drivers/staging/comedi/comedi_buf.c index b6cd67ad55d..d4be0e68509 100644 --- a/drivers/staging/comedi/comedi_buf.c +++ b/drivers/staging/comedi/comedi_buf.c @@ -76,6 +76,12 @@ static void __comedi_buf_alloc(struct comedi_device *dev, struct comedi_buf_page *buf; unsigned i; + if (!IS_ENABLED(CONFIG_HAS_DMA) && s->async_dma_dir != DMA_NONE) { + dev_err(dev->class_dev, + "dma buffer allocation not supported\n"); + return; + } + async->buf_page_list = vzalloc(sizeof(*buf) * n_pages); if (async->buf_page_list) pages = vmalloc(sizeof(struct page *) * n_pages); |