WARNING: line length of 86 exceeds 80 columns
#100: FILE: drivers/virtio/virtio_ring.c:612:
+			if (vring_map_one_sg(vq, sg, DMA_TO_DEVICE, &addr, premapped))

WARNING: line length of 88 exceeds 80 columns
#118: FILE: drivers/virtio/virtio_ring.c:628:
+			if (vring_map_one_sg(vq, sg, DMA_FROM_DEVICE, &addr, premapped))

WARNING: line length of 85 exceeds 80 columns
#208: FILE: drivers/virtio/virtio_ring.c:1320:
+				extra[i].addr = premapped ? DMA_MAPPING_ERROR : addr;

WARNING: line length of 82 exceeds 80 columns
#247: FILE: drivers/virtio/virtio_ring.c:1432:
+						    in_sgs, data, premapped, gfp);

WARNING: line length of 85 exceeds 80 columns
#291: FILE: drivers/virtio/virtio_ring.c:2213:
+					out_sgs, in_sgs, data, ctx, premapped, gfp) :

WARNING: line length of 84 exceeds 80 columns
#294: FILE: drivers/virtio/virtio_ring.c:2215:
+					out_sgs, in_sgs, data, ctx, premapped, gfp);

total: 0 errors, 6 warnings, 0 checks, 272 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 9512169ab607 ("virtio_ring: perform premapped operations based on per-buffer") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE 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, 6 warnings, 0 checks, 272 lines checked