From patchwork Mon Jul 29 12:42:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bryan O'Donoghue X-Patchwork-Id: 815169 Received: from mail-wr1-f45.google.com (mail-wr1-f45.google.com [209.85.221.45]) (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 B7F49149DEA for ; Mon, 29 Jul 2024 12:42:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722256940; cv=none; b=ZJtTd81JpF5V8qEAcFvKhYxQdQPnW6wf0GtsQdJi788QZP3p5SQfyXNeDhuXwpsrjCqHb0k8WU3iCCMY6KfWkhZZxT+Kg3eQXkxRj+Y0xh4L29rZyEqqQqc29yxRGvIshIAMZ3dDVyHO5owJowdxLtgDR/oCCOoI4J0VbLG1yrk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722256940; c=relaxed/simple; bh=XMtSAnQLUPLTjEcZ9/jJuTztPkljj4KBCEwVdIRm9FQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=RhsrDXOcFu15Zv9A+xj7pKvwacHUuoVqlMzz6uGxe/07OSwK6Bw0ArMoqCDGKyrEvecCZe4+batj0ByIPe0VV5pEgEMgYw/awi0EenocCtBVxqZLNYWqAy6aIAJ2UdhAHrKb0cwGOCekxUbcclWxNHcL8AiPRj3qi1QiRwWQ5CY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=zdIdYL+5; arc=none smtp.client-ip=209.85.221.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="zdIdYL+5" Received: by mail-wr1-f45.google.com with SMTP id ffacd0b85a97d-3687fb526b9so1347633f8f.0 for ; Mon, 29 Jul 2024 05:42:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1722256937; x=1722861737; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=N37H6kLbkNAIPuExxunsB7bhPLTHsDDj/8KnxxdH8yw=; b=zdIdYL+5faQpUDJZwI9HxYaAMurA7BiYm+TksSWvmQGV+37eD/VWOMxc71Z/GNIJY7 6T808NtQfItXKarLR2yWJg63UioqK9129dtyXa2TKxQflgtmr1k66YSpdKhkrpwBdzk6 /nA4cGBVgwe3DDGTTHD51/whL66ZH4wXzuB0OsuGVlulJGO1A7TbcIjxiCqm9uy86O4c d+TRsVLkhIvauVLiGi19uEI4FDWl0vDR4S0nAOf4dmSh3qu/7C9tHZF1/8xk2eItr5dX Xx8SmFfGQHCKrW667KKG76uYtFtU3KjgI/TnE/VzYKoQCduOjarIbPh+PZGCmViZezrM 4+3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722256937; x=1722861737; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=N37H6kLbkNAIPuExxunsB7bhPLTHsDDj/8KnxxdH8yw=; b=NvG5TxK1gbs5CBeJ1CLky4C7vhYY1lT17cfrAfJ0k91zkzFqNbz5azdIDqn4reA1/+ hN0fLUvvesl/0xkFyi2PB1fwl0l1My/hwuIy8to/wE4U/wYioA6Rm6a6RY8054kGzK3D TyHSrPYkDgOhLB2dEQVu8m2XuV2RIA+0lDmXd48E5aBITB9YLF4dPfKeRfKxx0vCH2uX JRJLNU6RTaFu2+ENuxIXjAY/0oZB2gZCj3SJBeKgKqHvHOLIrnZaw3YxADhiEyMqRdfq 9c76EUHyD7B1RAEo6h2xGoWsGHHYrHlDpjAlX7uSAhW1UnBZqJFM9q2CdURESS+7d9F2 Dl/Q== X-Gm-Message-State: AOJu0YygaPbkJ+sPWQMKuCRAdWZ1vIH7oYn07Pt/k1J7iZbrq8+tz4zZ MEIizBDyosc+WCxlsHSaDYek89z+NBPfbJvR0bmCWfCClEm5w6AVrkHAHjYX4e7tZt1/3E5C0aY XEHA= X-Google-Smtp-Source: AGHT+IFd9o55Nf2Yjsmn3MKtdq05hMAb79DL3MCHg9LTvgi6dSD5URw35jk1cVD61sFRmsWeY6X4Hw== X-Received: by 2002:a05:6000:1a53:b0:367:9851:4f22 with SMTP id ffacd0b85a97d-36b5d0cc08cmr4558101f8f.58.1722256936868; Mon, 29 Jul 2024 05:42:16 -0700 (PDT) Received: from [127.0.1.1] ([176.61.106.227]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-36b367c092esm12106275f8f.13.2024.07.29.05.42.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Jul 2024 05:42:16 -0700 (PDT) From: Bryan O'Donoghue Date: Mon, 29 Jul 2024 13:42:03 +0100 Subject: [PATCH v3 2/2] media: qcom: camss: Fix ordering of pm_runtime_enable Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240729-linux-next-24-07-13-camss-fixes-v3-2-38235dc782c7@linaro.org> References: <20240729-linux-next-24-07-13-camss-fixes-v3-0-38235dc782c7@linaro.org> In-Reply-To: <20240729-linux-next-24-07-13-camss-fixes-v3-0-38235dc782c7@linaro.org> To: Robert Foss , Todor Tomov , Mauro Carvalho Chehab , Hans Verkuil , Hans Verkuil , Milen Mitkov Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Mauro Carvalho Chehab , Johan Hovold , Bryan O'Donoghue , stable@vger.kernel.org X-Mailer: b4 0.15-dev-13183 pm_runtime_enable() should happen prior to vfe_get() since vfe_get() calls pm_runtime_resume_and_get(). This is a basic race condition that doesn't show up for most users so is not widely reported. If you blacklist qcom-camss in modules.d and then subsequently modprobe the module post-boot it is possible to reliably show this error up. The kernel log for this error looks like this: qcom-camss ac5a000.camss: Failed to power up pipeline: -13 Fixes: 02afa816dbbf ("media: camss: Add basic runtime PM support") Reported-by: Johan Hovold Closes: https://lore.kernel.org/lkml/ZoVNHOTI0PKMNt4_@hovoldconsulting.com/ Tested-by: Johan Hovold Cc: Signed-off-by: Bryan O'Donoghue Reviewed-by: Konrad Dybcio --- drivers/media/platform/qcom/camss/camss.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c index 51b1d3550421..d64985ca6e88 100644 --- a/drivers/media/platform/qcom/camss/camss.c +++ b/drivers/media/platform/qcom/camss/camss.c @@ -2283,6 +2283,8 @@ static int camss_probe(struct platform_device *pdev) v4l2_async_nf_init(&camss->notifier, &camss->v4l2_dev); + pm_runtime_enable(dev); + num_subdevs = camss_of_parse_ports(camss); if (num_subdevs < 0) { ret = num_subdevs; @@ -2323,8 +2325,6 @@ static int camss_probe(struct platform_device *pdev) } } - pm_runtime_enable(dev); - return 0; err_register_subdevs: @@ -2332,6 +2332,7 @@ static int camss_probe(struct platform_device *pdev) err_v4l2_device_unregister: v4l2_device_unregister(&camss->v4l2_dev); v4l2_async_nf_cleanup(&camss->notifier); + pm_runtime_disable(dev); err_genpd_cleanup: camss_genpd_cleanup(camss);