Vinicius Costa Gomes 900f1aee1b igb: Fix missing time sync events ... [ Upstream commit ee14cc9ea1 ] Fix "double" clearing of interrupts, which can cause external events or timestamps to be missed. The E1000_TSIRC Time Sync Interrupt Cause register can be cleared in two ways, by either reading it or by writing '1' into the specific cause bit. This is documented in section 8.16.1. The following flow was used: 1. read E1000_TSIRC into 'tsicr'; 2. handle the interrupts present into 'tsirc' and mark them in 'ack'; 3. write 'ack' into E1000_TSICR; As both (1) and (3) will clear the interrupt cause, if the same interrupt happens again between (1) and (3) it will be ignored, causing events to be missed. Remove the extra clear in (3). Fixes: 00c65578b4 ("igb: enable internal PPS for the i210") Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com> Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel) Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-03-26 18:16:53 -04:00
..
e1000_82575.c	intel: legacy: field get conversion	2023-12-18 11:20:43 -08:00
e1000_82575.h
e1000_defines.h	igb: Remove duplicate defines	2022-06-09 10:05:31 -07:00
e1000_hw.h
e1000_i210.c	intel: legacy: field get conversion	2023-12-18 11:20:43 -08:00
e1000_i210.h
e1000_mac.c	intel: legacy: field get conversion	2023-12-18 11:20:43 -08:00
e1000_mac.h
e1000_mbx.c
e1000_mbx.h
e1000_nvm.c	intel: legacy: field get conversion	2023-12-18 11:20:43 -08:00
e1000_nvm.h
e1000_phy.c	intel: legacy: field get conversion	2023-12-18 11:20:43 -08:00
e1000_phy.h
e1000_regs.h	igb: Remove duplicate defines	2022-06-09 10:05:31 -07:00
igb.h	igb: Fix string truncation warnings in igb_set_fw_version	2024-02-14 09:43:09 -08:00
igb_ethtool.c	intel: legacy: field get conversion	2023-12-18 11:20:43 -08:00
igb_hwmon.c
igb_main.c	igb: Fix missing time sync events	2024-03-26 18:16:53 -04:00
igb_ptp.c	igb: extend PTP timestamp adjustments to i211	2024-02-28 20:16:48 -08:00
Makefile