[{"id":3680606,"web_url":"http://patchwork.ozlabs.org/comment/3680606/","msgid":"","list_archive_url":null,"date":"2026-04-22T12:48:13","subject":"Re: [Intel-wired-lan] [PATCH iwl-net 2/2] ice: ptp: use primary NAC\n semaphore on E825","submitter":{"id":75597,"url":"http://patchwork.ozlabs.org/api/people/75597/","name":"Loktionov, Aleksandr","email":"aleksandr.loktionov@intel.com"},"content":"> -----Original Message-----\n> From: Intel-wired-lan On Behalf\n> Of Grzegorz Nitka\n> Sent: Wednesday, April 22, 2026 2:32 PM\n> To: intel-wired-lan@lists.osuosl.org\n> Cc: netdev@vger.kernel.org; Kubalewski, Arkadiusz\n> ; Nguyen, Anthony L\n> ; Kitszel, Przemyslaw\n> \n> Subject: [Intel-wired-lan] [PATCH iwl-net 2/2] ice: ptp: use primary\n> NAC semaphore on E825\n> \n> For E825 2xNAC configurations, PTP semaphore operations must hit the\n> primary NAC register block so both sides coordinate on the same lock.\n> \n> Commit e2193f9f9ec9 (\"ice: enable timesync operation on 2xNAC E825\n> devices\") updated other primary-only PTP register accesses to use the\n> primary NAC on non-primary functions, but left ice_ptp_lock() and\n> ice_ptp_unlock() operating on the local NAC. As a result, secondary\n> NAC PTP paths can take a different semaphore than the primary side.\n> \n> Select the primary hardware in ice_ptp_lock() and ice_ptp_unlock()\n> when the current function is not primary, keeping semaphore operations\n> symmetric and consistent with the rest of the 2xNAC PTP register\n> access path.\n> \n> Fixes: e2193f9f9ec9 (\"ice: enable timesync operation on 2xNAC E825\n> devices\")\n> Reviewed-by: Arkadiusz Kubalewski \n> Signed-off-by: Grzegorz Nitka \n\nI recommend to add Cc: stable@vger.kernel.org\n\nReviewed-by: Aleksandr Loktionov \n\n> ---\n> drivers/net/ethernet/intel/ice/ice_ptp_hw.c | 9 +++++++++\n> 1 file changed, 9 insertions(+)\n> \n> diff --git a/drivers/net/ethernet/intel/ice/ice_ptp_hw.c\n> b/drivers/net/ethernet/intel/ice/ice_ptp_hw.c\n> index 8bb94e785f2a..2c18e16fe053 100644\n> --- a/drivers/net/ethernet/intel/ice/ice_ptp_hw.c\n> +++ b/drivers/net/ethernet/intel/ice/ice_ptp_hw.c\n> @@ -5264,9 +5264,13 @@ static void ice_ptp_init_phy_e830(struct\n> ice_ptp_hw *ptp)\n> */\n> bool ice_ptp_lock(struct ice_hw *hw)\n> {\n> +\tstruct ice_pf *pf = container_of(hw, struct ice_pf, hw);\n> \tu32 hw_lock;\n> \tint i;\n> \n> +\tif (!ice_is_primary(hw))\n> +\t\thw = ice_get_primary_hw(pf);\n> +\n> #define MAX_TRIES 15\n> \n> \tfor (i = 0; i < MAX_TRIES; i++) {\n> @@ -5293,6 +5297,11 @@ bool ice_ptp_lock(struct ice_hw *hw)\n> */\n> void ice_ptp_unlock(struct ice_hw *hw)\n> {\n> +\tstruct ice_pf *pf = container_of(hw, struct ice_pf, hw);\n> +\n> +\tif (!ice_is_primary(hw))\n> +\t\thw = ice_get_primary_hw(pf);\n> +\n> \twr32(hw, PFTSYN_SEM + (PFTSYN_SEM_BYTES * hw->pf_id), 0); }\n> \n> --\n> 2.39.3","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","intel-wired-lan@lists.osuosl.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","intel-wired-lan@lists.osuosl.org"],"Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=osuosl.org header.i=@osuosl.org header.a=rsa-sha256\n header.s=default header.b=ZSSjHeRf;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=2605:bc80:3010::138; helo=smtp1.osuosl.org;\n envelope-from=intel-wired-lan-bounces@osuosl.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from smtp1.osuosl.org (smtp1.osuosl.org [IPv6:2605:bc80:3010::138])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g0zY42Pj9z1y2d\n\tfor ; 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