From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f173.google.com (mail-pg1-f173.google.com [209.85.215.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 08F50472F82 for ; Fri, 4 Sep 2026 10:55:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788519361; cv=none; b=XOea7LUs7RusAF8UjkxjChXOzYn7yxi81FsoOwVNcK1iS/AK+jyd0PsoGD3lJZeqcQJefSeskDlTtDfEGe+wFpptrkfBgYCVu0aCQW/JywqlyQIFi4DboKo1isWJJGpimgREC6wy1DTKXzeGyFTEeUKLrDy0n/FVPEW4Bx+RrQg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788519361; c=relaxed/simple; bh=v/kjOdY5Lu1zx1XvZRZFRlrggOLQEbcgXqmMq7HMqbM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=E1mHUqUkjzj/6Z486H9N6Z3obFodXDkrxCGpxCNd8oo2+O+L6rdSsURiHV+NtGHo6OMU9PNj9Ovh8bSurGN/kQjCxJMkUSHvWAT+dKM0knKFxi1ay2r+XI+SMp/ngrJcGfl017L//FfDko6EtqBsMGN0GdRw+y3z4TI4M7LoNG0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=RvtWzbst; arc=none smtp.client-ip=209.85.215.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="RvtWzbst" Received: by mail-pg1-f173.google.com with SMTP id 41be03b00d2f7-cc147d86bebso904998a12.0 for ; Fri, 04 Sep 2026 03:55:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788519359; x=1789124159; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=VKYmUlTOqIu/1cBSCueueKVNw/xbCQqglwL7pQcSE8g=; b=RvtWzbstjTqLvkEiFx0fZfqyw50Y/66L5Ph72ANnoag967aBk+QGAGV0lODjMniCSU GRIzyDsG2Qg1Hh9WwdG4ccB2Ijmt3DWJo+zOytJJaeT7NCrsiJ8bis84rAMU+o/V49/3 Vk1QaPxx2JWufg/voxftEFitFXopdVB2NNXzIg8kpwFlNqMXvIbLdIU2qAECOAT4fSa7 jSx9L1K9xHUAIhl2lKTkW2tZmgAgbPx+JVdteg5PPIDtr3Qd7QgqO6c+aPSLos9awxHj k3u46LQj3gyscvq/7fiR/SqkZ+2+A2/FFq3yixcXrQKrxvBgCVfTtY9kwb2SIFOv+NYb fh5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788519359; x=1789124159; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=VKYmUlTOqIu/1cBSCueueKVNw/xbCQqglwL7pQcSE8g=; b=BeyjvXohkxkjoe+w6bOK4LrunLs0nfGjncPB8rU82MgLzBHNkWxvyIQb5zav11gbYn 4jPKo116Ie3XCg6T7mELdDNfgyl00EhWw6gkZazSLw/a9iNKUdX4p3cG9uqluUDrjrmN bPpH4GWcev8ST/mT838DNZlfFKvruspnrbVUv/2JsJdvn124jwVoe0OycR9dWYFGh+sF PppzdDXI5K8SlXWSpnwFDCsaE335S4R7IkKZvRkLJKaJ54SEkn7PFOR88kM/DE2AB/Ul 7ef8HCor2HyLeOd0Cag99vc3jcgjCxoLDfomMcobt9SiIiWQfJwxKJatPQe8wdeYjIdw saEw== X-Forwarded-Encrypted: i=1; AKwUvBw1yDFdoeY99btbp0ux8DKK+kqdyPEJ98YTD2FWP4SZHDTeztu1+BRnNWDotoDkrsDo+QqADHvqriBrkMM=@vger.kernel.org X-Gm-Message-State: AFuF++lTcRKixk4z1Q3gPvqcb7nmgFCeKzx+AcOq3hsRvIvWE9RuG+i6 Uq5vjfGFP6RmsBTwwMoz9UInig4zBQjpIYirrVMOcxttPmcFTNNW30El X-Gm-Gg: AYBFou06/cAFrAsk3al78qXodGzbm6WUP0lLFn+LCmFuPxUFy/lJvqukPjuHkyoyb3H v/+Aoxc38jjGGQ2UOiyB4J91aceUSNNgdNfHWgqAHtq+dFc76Y5ohUK0HYkp3A/bRcDYLvOVx0t BkMFzUj6/j5VYyNgZhbX0QuuryRP9+a/kQM+nIOlNMZPwhcA1kV5kfHosH+gcI28+5c25TRVttV dNAOh1oGCwslJoOAsv0PDFewhehCvjLFLXWRQJCeM1gdvxBtUbJnNSYoBy4sgVf0CLbrDRP9F8A DghbPIv5qiMoTAc9QfeBz32W/aVr7AoD2mfY6KDAh84q8GNT+Uu6/rP3JJDjLEXkXdTpAjQ4Pgd MGftyPbG8AATrcEscdvariHksKtVGOtDEVxn2OzAWvJFam3Up2Fm2Mpc06a9wvJJmW0FOCdVTTd J3gQHyqTN4SD9ulC6Uq8swlbink5EZFaanRuLRgeOK+aA30PkCCmMqzcircR7iuYBYby3TehpRk Aihclo9SU5eQZIjxS3gbt2m38GZiCYSWayduCQJxSaL51QvNtM98IwF3eS88xgqfXyld/T9Dbie hlIyF0f1xV94WaF8 X-Received: by 2002:a17:90b:3b41:b0:398:9bd3:d6d2 with SMTP id 98e67ed59e1d1-39b27ea25b9mr3194454a91.12.1788519358927; Fri, 04 Sep 2026 03:55:58 -0700 (PDT) Received: from phuc-desktop.. ([183.91.15.56]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39b2612ba2bsm3842279a91.14.2026.09.04.03.55.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Sep 2026 03:55:58 -0700 (PDT) From: phucduc.bui@gmail.com To: Wei Fang , Frank Li , Shenwei Wang Cc: Andrew Lunn , davem@davemloft.net, Eric Dumazet , Jakub Kicinski , Paolo Abeni , Richard Cochran , Stephen Boyd , imx@lists.linux.dev, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, bui duc phuc Subject: [PATCH net v3] net: fec: Propagate PTP initialization errors Date: Fri, 4 Sep 2026 17:55:42 +0700 Message-ID: <20260904105542.70540-1-phucduc.bui@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: bui duc phuc Change fec_ptp_init() to return an error code instead of silently ignoring failures during PTP initialization. The PPS IRQ is not required for the FEC/PTP functionality, so its absence should not make the probe fail. However, an unavailable optional IRQ should be distinguished from an actual error returned during the IRQ lookup. If a platform does not support the PPS IRQ, it can omit the IRQ from its device tree and the optional lookup will return -ENXIO. Propagate other errors from the IRQ lookup instead of silently ignoring them. Also propagate failures from devm_request_irq() and ptp_clock_register(). Update the function declaration in fec.h accordingly. Found by manual code inspection. Fixes: b86bcb299092 ("net: fec_ptp: Use platform_get_irq_xxx_optional() to avoid error message") Signed-off-by: bui duc phuc --- Link v1: https://lore.kernel.org/all/20260820111416.97917-1-phucduc.bui@gmail.com/ Link v2: https://lore.kernel.org/all/20260903092430.354186-1-phucduc.bui@gmail.com/ Changes in v2: - Squash the two patches into one. - Add error handling for platform_get_irq_byname_optional(). - Fix error handling for ptp_clock_register(). Changes in v3: - Retarget the patch to the net tree instead of net-next. - Add error handling for platform_get_irq_byname_optional() in fec_probe() for the fec_enet_interrupt IRQ. drivers/net/ethernet/freescale/fec.h | 2 +- drivers/net/ethernet/freescale/fec_main.c | 11 ++++++++--- drivers/net/ethernet/freescale/fec_ptp.c | 22 ++++++++++++++-------- 3 files changed, 23 insertions(+), 12 deletions(-) diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h index 7176803146f3..8831da37326b 100644 --- a/drivers/net/ethernet/freescale/fec.h +++ b/drivers/net/ethernet/freescale/fec.h @@ -692,7 +692,7 @@ struct fec_enet_private { u64 ethtool_stats[]; }; -void fec_ptp_init(struct platform_device *pdev, int irq_idx); +int fec_ptp_init(struct platform_device *pdev, int irq_idx); void fec_ptp_restore_state(struct fec_enet_private *fep); void fec_ptp_save_state(struct fec_enet_private *fep); void fec_ptp_stop(struct platform_device *pdev); diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index 794ec427b0ee..a9a458703547 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -5384,8 +5384,11 @@ fec_probe(struct platform_device *pdev) goto failed_reset; irq_cnt = fec_enet_get_irq_cnt(pdev); - if (fep->bufdesc_ex) - fec_ptp_init(pdev, irq_cnt); + if (fep->bufdesc_ex) { + ret = fec_ptp_init(pdev, irq_cnt); + if (ret) + goto failed_reset; + } ret = fec_enet_init(ndev); if (ret) @@ -5394,7 +5397,9 @@ fec_probe(struct platform_device *pdev) for (i = 0; i < irq_cnt; i++) { snprintf(irq_name, sizeof(irq_name), "int%d", i); irq = platform_get_irq_byname_optional(pdev, irq_name); - if (irq < 0) + if (irq < 0 && irq != -ENXIO) + return irq; + if (irq == -ENXIO) irq = platform_get_irq(pdev, i); if (irq < 0) { ret = irq; diff --git a/drivers/net/ethernet/freescale/fec_ptp.c b/drivers/net/ethernet/freescale/fec_ptp.c index 56801c2009d5..557a76797eba 100644 --- a/drivers/net/ethernet/freescale/fec_ptp.c +++ b/drivers/net/ethernet/freescale/fec_ptp.c @@ -736,7 +736,7 @@ static irqreturn_t fec_pps_interrupt(int irq, void *dev_id) * cyclecounter init routine and exits. */ -void fec_ptp_init(struct platform_device *pdev, int irq_idx) +int fec_ptp_init(struct platform_device *pdev, int irq_idx) { struct net_device *ndev = platform_get_drvdata(pdev); struct fec_enet_private *fep = netdev_priv(ndev); @@ -779,26 +779,32 @@ void fec_ptp_init(struct platform_device *pdev, int irq_idx) HRTIMER_MODE_REL); irq = platform_get_irq_byname_optional(pdev, "pps"); - if (irq < 0) + if (irq < 0 && irq != -ENXIO) + return irq; + if (irq == -ENXIO) { irq = platform_get_irq_optional(pdev, irq_idx); - /* Failure to get an irq is not fatal, - * only the PTP_CLOCK_PPS clock events should stop - */ - if (irq >= 0) { + if (irq < 0 && irq != -ENXIO) + return irq; + } + + if (irq > 0) { ret = devm_request_irq(&pdev->dev, irq, fec_pps_interrupt, 0, pdev->name, ndev); if (ret < 0) - dev_warn(&pdev->dev, "request for pps irq failed(%d)\n", - ret); + return ret; } fep->ptp_clock = ptp_clock_register(&fep->ptp_caps, &pdev->dev); if (IS_ERR(fep->ptp_clock)) { + ret = PTR_ERR(fep->ptp_clock); fep->ptp_clock = NULL; dev_err(&pdev->dev, "ptp_clock_register failed\n"); + return ret; } schedule_delayed_work(&fep->time_keep, HZ); + + return 0; } void fec_ptp_save_state(struct fec_enet_private *fep) -- 2.43.0