On 23/10/2024 5:30, Chris H wrote:
From: Christopher S M Hall <[email protected]> Lengthen the hardware retry timer to four microseconds. The i225/i226 hardware retries if it receives an inappropriate response from the upstream device. If the device retries too quickly, the root port does not respond. The issue can be reproduced with the following: $ sudo phc2sys -R 1000 -O 0 -i tsn0 -m Note: 1000 Hz (-R 1000) is unrealistically large, but provides a way to quickly reproduce the issue. PHC2SYS exits with: "ioctl PTP_OFFSET_PRECISE: Connection timed out" when the PTM transaction fails Fixes: 6b8aa753a9f9 ("igc: Decrease PTM short interval from 10 us to 1 us") Signed-off-by: Christopher S M Hall <[email protected]> --- drivers/net/ethernet/intel/igc/igc_defines.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Tested-by: Avigail Dahan <[email protected]>
