From: Yuusuke Ashiduka <ashid...@jp.fujitsu.com> Date: Tue, 17 Jan 2017 16:48:20 +0900
> If highmem and 2GB or more of memory are valid, > "this_frag-> page.p" indicates the highmem area, > so the result of page_address() is NULL and panic occurs. > > This commit fixes this by using the skb_frag_dma_map() helper, > which takes care of mapping the skb fragment properly. Additionally, > the type of mapping is now tracked, so it can be unmapped using > dma_unmap_page or dma_unmap_single when appropriate. This patch submission is lacking a proper signoff.
