WARNING: line length of 91 exceeds 80 columns
#142: FILE: drivers/net/virtio_net.c:577:
+static struct virtnet_sq_dma *virtnet_sq_map_sg(struct send_queue *sq, int num, void *data)

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
#276: FILE: drivers/net/virtio_net.c:708:
+	BUG_ON(virtqueue_set_dma_premapped(sq->vq, premapped));

total: 0 errors, 2 warnings, 0 checks, 284 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 72a2c44cdd93 ("virtio_net: sq support premapped mode") 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, 2 warnings, 0 checks, 284 lines checked