WARNING: please, no space before tabs
#40: FILE: drivers/net/ethernet/realtek/r8169_main.c:410:
+#define COMBO_LTR_EXTEND_EN ^IBIT(0)$

WARNING: line length of 86 exceeds 80 columns
#71: FILE: drivers/net/ethernet/realtek/r8169_main.c:2956:
+		r8168_mac_ocp_modify(tp, LTR_OBFF_LOCK, 0x0000, LINK_SPEED_CHANGE_EN);

WARNING: line length of 86 exceeds 80 columns
#91: FILE: drivers/net/ethernet/realtek/r8169_main.c:2976:
+		r8168_mac_ocp_modify(tp, LTR_OBFF_LOCK, 0x0000, LINK_SPEED_CHANGE_EN);

WARNING: line length of 86 exceeds 80 columns
#109: FILE: drivers/net/ethernet/realtek/r8169_main.c:2994:
+		r8168_mac_ocp_modify(tp, LTR_OBFF_LOCK, 0x0000, LINK_SPEED_CHANGE_EN);

WARNING: line length of 97 exceeds 80 columns
#114: FILE: drivers/net/ethernet/realtek/r8169_main.c:2999:
+		RTL_W8(tp, COMBO_LTR_EXTEND, RTL_R8(tp, COMBO_LTR_EXTEND) | COMBO_LTR_EXTEND_EN);

CHECK: Please don't use multiple blank lines
#145: FILE: drivers/net/ethernet/realtek/r8169_main.c:3030:
+
+

total: 0 errors, 5 warnings, 1 checks, 148 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 0398b9c182c2 ("r8169: enable LTR support") 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, 5 warnings, 1 checks, 148 lines checked