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Subject: Re: [Intel-wired-lan] [PATCH iwl-net v2 4/4] igc: Add lock preventing multiple simultaneous PTM transactions X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" On 23/10/2024 5:30, Chris H wrote: > From: Christopher S M Hall > > Add a mutex around the PTM transaction to prevent multiple transactors > > Multiple processes try to initiate a PTM transaction, one or all may > fail. This can be reproduced by running two instances of the > following: > > $ sudo phc2sys -O 0 -i tsn0 -m > > PHC2SYS exits with: > > "ioctl PTP_OFFSET_PRECISE: Connection timed out" when the PTM transaction > fails > > Note: Normally two instance of PHC2SYS will not run, but one process > should not break another. > > Fixes: a90ec8483732 ("igc: Add support for PTP getcrosststamp()") > Signed-off-by: Christopher S M Hall > --- > drivers/net/ethernet/intel/igc/igc.h | 1 + > drivers/net/ethernet/intel/igc/igc_ptp.c | 12 ++++++++++-- > 2 files changed, 11 insertions(+), 2 deletions(-) > Tested-by: Mor Bar-Gabay