CHECK: Macro argument '_priv' may be better as '(_priv)' to avoid precedence issues
#58: FILE: drivers/net/ethernet/renesas/rswitch.h:20:
+#define rswitch_for_all_ports(_priv, _rdev)			\
+	list_for_each_entry(_rdev, &_priv->port_list, list)

WARNING: line length of 82 exceeds 80 columns
#127: FILE: drivers/net/ethernet/renesas/rswitch.h:1069:
+void rswitch_modify(void __iomem *addr, enum rswitch_reg reg, u32 clear, u32 set);

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#131: 
new file mode 100644

WARNING: line length of 83 exceeds 80 columns
#172: FILE: drivers/net/ethernet/renesas/rswitch_l2.c:37:
+				       FWPC0_MACSSA | FWPC0_MACHLA | FWPC0_MACHMA);

WARNING: line length of 82 exceeds 80 columns
#180: FILE: drivers/net/ethernet/renesas/rswitch_l2.c:45:
+				       FWPC0_MACSSA | FWPC0_MACHLA | FWPC0_MACHMA,

WARNING: line length of 91 exceeds 80 columns
#211: FILE: drivers/net/ethernet/renesas/rswitch_l2.c:76:
+			iowrite32(FIELD_PREP(FWCP2_LTWFW_MASK, fwd_mask | BIT(rdev->port)),

WARNING: line length of 91 exceeds 80 columns
#224: FILE: drivers/net/ethernet/renesas/rswitch_l2.c:89:
+			iowrite32(FIELD_PREP(FWCP2_LTWFW_MASK, fwd_mask | BIT(rdev->port)),

WARNING: line length of 83 exceeds 80 columns
#420: FILE: drivers/net/ethernet/renesas/rswitch_l2.c:285:
+	ret = register_switchdev_blocking_notifier(&rswitch_switchdev_blocking_nb);

WARNING: line length of 81 exceeds 80 columns
#491: FILE: drivers/net/ethernet/renesas/rswitch_main.c:41:
+void rswitch_modify(void __iomem *addr, enum rswitch_reg reg, u32 clear, u32 set)

total: 0 errors, 8 warnings, 1 checks, 591 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 f5ba37addffd ("net: renesas: rswitch: add offloading for L2 switching") 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, 1 checks, 591 lines checked