WARNING: line length of 85 exceeds 80 columns
#125: FILE: drivers/net/virtio_net.c:710:
+		page_pool_put_page(rq->page_pool, virt_to_head_page(buf), -1, false);

WARNING: Do not crash the kernel unless it is absolutely unavoidable--use WARN_ON_ONCE() plus recovery code (if feasible) instead of BUG() or variants
#279: FILE: drivers/net/virtio_net.c:934:
+	BUG_ON(!rq->page_pool);

WARNING: line length of 81 exceeds 80 columns
#301: FILE: drivers/net/virtio_net.c:1217:
+		curr_skb  = virtnet_skb_append_frag(rq, head_skb, curr_skb, page,

WARNING: line length of 81 exceeds 80 columns
#567: FILE: drivers/net/virtio_net.c:2439:
+		curr_skb  = virtnet_skb_append_frag(rq, head_skb, curr_skb, page,

WARNING: line length of 89 exceeds 80 columns
#613: FILE: drivers/net/virtio_net.c:2608:
+	unsigned int len = vi->hdr_len + VIRTNET_RX_PAD + GOOD_PACKET_LEN + xdp_headroom;

WARNING: line length of 82 exceeds 80 columns
#637: FILE: drivers/net/virtio_net.c:2621:
+	err = virtnet_rq_submit(rq, buf, vi->hdr_len + GOOD_PACKET_LEN, ctx, gfp);

WARNING: line length of 85 exceeds 80 columns
#640: FILE: drivers/net/virtio_net.c:2624:
+		page_pool_put_page(rq->page_pool, virt_to_head_page(buf), -1, false);

WARNING: line length of 85 exceeds 80 columns
#704: FILE: drivers/net/virtio_net.c:2726:
+		page_pool_put_page(rq->page_pool, virt_to_head_page(buf), -1, false);

WARNING: line length of 81 exceeds 80 columns
#763: FILE: drivers/net/virtio_net.c:3116:
+			pp_params.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV;

WARNING: line length of 86 exceeds 80 columns
#769: FILE: drivers/net/virtio_net.c:3122:
+			/* No DMA API (e.g., VDUSE): page_pool for allocation only. */

total: 0 errors, 10 warnings, 0 checks, 848 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit a4770965801a ("virtio_net: add page_pool support for buffer allocation") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 10 warnings, 0 checks, 848 lines checked