WARNING: please write a help paragraph that fully describes the config symbol
#63: FILE: drivers/net/ethernet/renesas/Kconfig:62:
+config RTSN
+	tristate "Renesas Ethernet-TSN support"
+	depends on ARCH_RENESAS || COMPILE_TEST
+	depends on PTP_1588_CLOCK
+	select CRC32
+	select PHYLIB
+	select RENESAS_GEN4_PTP
+	help
+	  Renesas Ethernet-TSN device driver.
+

WARNING: line length of 90 exceeds 80 columns
#292: FILE: drivers/net/ethernet/renesas/rtsn.c:203:
+			ts.tv_nsec = le32_to_cpu(desc->ts_nsec & cpu_to_le32(0x3fffffff));

WARNING: line length of 81 exceeds 80 columns
#421: FILE: drivers/net/ethernet/renesas/rtsn.c:332:
+			  sizeof(struct rtsn_ext_desc) * (priv->num_tx_ring + 1),

WARNING: line length of 84 exceeds 80 columns
#426: FILE: drivers/net/ethernet/renesas/rtsn.c:337:
+			  sizeof(struct rtsn_ext_ts_desc) * (priv->num_rx_ring + 1),

WARNING: line length of 88 exceeds 80 columns
#462: FILE: drivers/net/ethernet/renesas/rtsn.c:373:
+					   sizeof(struct rtsn_ext_desc) * (tx_size + 1),

WARNING: line length of 91 exceeds 80 columns
#465: FILE: drivers/net/ethernet/renesas/rtsn.c:376:
+					   sizeof(struct rtsn_ext_ts_desc) * (rx_size + 1),

WARNING: line length of 83 exceeds 80 columns
#494: FILE: drivers/net/ethernet/renesas/rtsn.c:405:
+	for (i = 0, tx_desc = priv->tx_ring; i < priv->num_tx_ring; i++, tx_desc++)

WARNING: line length of 85 exceeds 80 columns
#506: FILE: drivers/net/ethernet/renesas/rtsn.c:417:
+	for (i = 0, rx_desc = priv->rx_ring; i < priv->num_rx_ring; i++, rx_desc++) {

total: 0 errors, 8 warnings, 0 checks, 1888 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 8fe74642fb89 ("net: ethernet: rtsn: Add support for Renesas Ethernet-TSN") 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, 8 warnings, 0 checks, 1888 lines checked