WARNING: line length of 81 exceeds 80 columns
#169: FILE: drivers/net/mctp/mctp-pcc.c:64:
+static int mbox_write_to_buffer(struct pcc_mbox_chan *pchan, int len, void *data)

WARNING: line length of 96 exceeds 80 columns
#176: FILE: drivers/net/mctp/mctp-pcc.c:71:
+	pcc_header->length = len - sizeof(struct acpi_pcct_ext_pcc_shared_memory) + sizeof(u32);

WARNING: line length of 84 exceeds 80 columns
#203: FILE: drivers/net/mctp/mctp-pcc.c:98:
+	if (strncmp((unsigned char *)&pcc_header.command, MCTP_SIGNATURE, 4) != 0) {

WARNING: line length of 85 exceeds 80 columns
#388: FILE: drivers/net/mctp/mctp-pcc.c:283:
+	mctp_pcc_mtu = mctp_pcc_mtu - sizeof(struct acpi_pcct_ext_pcc_shared_memory);

total: 0 errors, 4 warnings, 0 checks, 400 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 3267ce52ce6b ("mctp pcc: Implement MCTP over PCC Transport") 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, 4 warnings, 0 checks, 400 lines checked