[{"id":3678115,"web_url":"http://patchwork.ozlabs.org/comment/3678115/","msgid":"","list_archive_url":null,"date":"2026-04-16T11:43:32","subject":"Re: [Intel-wired-lan] [PATCH net v6 2/2] ice: fix missing dpll\n notifications for SW pins","submitter":{"id":15321,"url":"http://patchwork.ozlabs.org/api/people/15321/","name":"Jiri Pirko","email":"jiri@resnulli.us"},"content":"Thu, Apr 16, 2026 at 01:39:52PM +0200, poros@redhat.com wrote:\n\n[..]\n\n>@@ -1233,7 +1259,6 @@ static int ice_dpll_sma_direction_set(struct ice_dpll_pin *p,\n> \t\t\tret = ice_dpll_pin_state_update(p->pf, target,\n> \t\t\t\t\t\t\ttype, extack);\n> \t}\n>-\n\n?\n\n> \treturn ret;\n> }\n> \n\n[..]","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=dI9JQRVO;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=2605:bc80:3010::136; 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Miller\" ,\n intel-wired-lan@lists.osuosl.org","Errors-To":"intel-wired-lan-bounces@osuosl.org","Sender":"\"Intel-wired-lan\" "}},{"id":3678116,"web_url":"http://patchwork.ozlabs.org/comment/3678116/","msgid":"","list_archive_url":null,"date":"2026-04-16T11:46:04","subject":"Re: [Intel-wired-lan] [PATCH net v6 2/2] ice: fix missing dpll\n notifications for SW pins","submitter":{"id":15321,"url":"http://patchwork.ozlabs.org/api/people/15321/","name":"Jiri Pirko","email":"jiri@resnulli.us"},"content":"Thu, Apr 16, 2026 at 01:39:52PM +0200, poros@redhat.com wrote:\n>The SMA/U.FL pin redesign (commit 2dd5d03c77e2 (\"ice: redesign dpll\n>sma/u.fl pins control\")) introduced software-controlled pins that wrap\n>backing CGU input/output pins, but never updated the notification and\n>data paths to propagate pin events to these SW wrappers.\n>\n>The periodic work sends dpll_pin_change_ntf() only for direct CGU input\n>pins. SW pins that wrap these inputs never receive change or phase\n>offset notifications, so userspace consumers such as synce4l monitoring\n>SMA pins via dpll netlink never learn about state transitions or phase\n>offset updates. Similarly, ice_dpll_phase_offset_get() reads the SW\n>pin's own phase_offset field which is never updated; the PPS monitor\n>writes to the backing CGU input's field instead.\n>\n>On top of that, when SMA or U.FL pin state changes via PCA9575 GPIO\n>write, the paired pin's state also changes because they share physical\n>signal paths, but no notification is sent for the peer pin.\n>\n>Fix by introducing ice_dpll_pin_ntf(), a wrapper around\n>dpll_pin_change_ntf() that also notifies any registered SMA/U.FL pin\n>whose backing CGU input matches. Replace all direct\n>dpll_pin_change_ntf() calls in the periodic notification paths with\n>this wrapper. Fix ice_dpll_phase_offset_get() to return the backing\n>CGU input's phase_offset for input-direction SW pins. Add\n>ice_dpll_sw_pin_notify_peer() to send a notification for the paired\n>SW pin after PCA9575 writes. The peer notification is called from\n>the dpll_pin_ops callback wrappers after pf->dplls.lock is released,\n>because dpll_pin_change_ntf() sends a netlink message that invokes\n>driver callbacks which acquire the same lock.\n>\n>Fixes: 2dd5d03c77e2 (\"ice: redesign dpll sma/u.fl pins control\")\n>Signed-off-by: Petr Oros \n>---\n>v6:\n> - fix deadlock reported by Michal Schmidt: dpll_pin_change_ntf() in\n> peer notification was called with dpll_lock held, causing deadlock.\n> Move the peer notification calls out of ice_dpll_sma_direction_set()\n> and ice_dpll_ufl_pin_state_set() into their dpll_pin_ops callback\n> wrappers, after pf->dplls.lock is released, and use\n> __dpll_pin_change_ntf() because dpll_lock is still held by the dpll\n> netlink layer (dpll_pin_pre_doit).\n>v5: https://lore.kernel.org/all/20260409102501.1447628-1-poros@redhat.com/\n> - add ice_dpll_sw_pin_notify_peer() for SMA/U.FL peer notification\n> when PCA9575 routing changes affect the paired pin (reported by\n> Intel test: SMA state change did not log U.FL status change in\n> subscribe monitor)\n>v4: https://lore.kernel.org/all/20260319205256.998876-1-poros@redhat.com/\n>v3: https://lore.kernel.org/all/20260220140700.2910174-1-poros@redhat.com/\n>v2: https://lore.kernel.org/all/20260219131500.2271897-1-poros@redhat.com/\n>v1: https://lore.kernel.org/all/20260218211414.1411163-1-poros@redhat.com/\n>---\n> drivers/net/ethernet/intel/ice/ice_dpll.c | 80 +++++++++++++++++++----\n> 1 file changed, 68 insertions(+), 12 deletions(-)\n\nCan this patch be split to 2? Looks like 2 fixes to me.","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=aFizyqgH;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=2605:bc80:3010::137; helo=smtp4.osuosl.org;\n envelope-from=intel-wired-lan-bounces@osuosl.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from smtp4.osuosl.org (smtp4.osuosl.org [IPv6:2605:bc80:3010::137])\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 4fxGS868cpz1yDF\n\tfor ; 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