From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ED468C00454 for ; Tue, 10 Dec 2019 21:08:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B883524698 for ; Tue, 10 Dec 2019 21:08:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576012105; bh=NzH5TClbBu5462yRYw6EnxsG/S/iQa3NNe+nix4WRqQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=daxyHxj6egiLcm4vXJNXmJPEf5w0iS0PEjlv12hZNipK67WB6w0NR8NPwBpgsuZGA 1eu7Jb44o67L6p8OJ4Jx9Hi1F3MqKakv6NuF8ZVUT9Rg2jir6Ju9HZUP6W77c1ZvWS lQ6LZoPbKNvbvUA0k+tlVFQC323i9S+OKMhHNgcg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727851AbfLJVIY (ORCPT ); Tue, 10 Dec 2019 16:08:24 -0500 Received: from mail.kernel.org ([198.145.29.99]:55288 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727809AbfLJVIM (ORCPT ); Tue, 10 Dec 2019 16:08:12 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5B4AF20836; Tue, 10 Dec 2019 21:08:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576012091; bh=NzH5TClbBu5462yRYw6EnxsG/S/iQa3NNe+nix4WRqQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kNM+BG8wCiLQlbGqkGHBZAhTGr36z2cvL3riXJXnxFVtfKtVJ/PwyG0wshyPfmjIt NEmxW0SonhacuPaFV+LDT1V95srEngMztAyekShcJ4acZhKwgLOUuV7Tdg+RIAfK88 xf4bd2DOvqTVpeh3Mr+hWUILZVsIN6MDnRVnU2r0= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Neil Armstrong , Christian Hewitt , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.4 068/350] media: meson/ao-cec: move cec_notifier_cec_adap_register after hw setup Date: Tue, 10 Dec 2019 16:02:53 -0500 Message-Id: <20191210210735.9077-29-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191210210735.9077-1-sashal@kernel.org> References: <20191210210735.9077-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Neil Armstrong [ Upstream commit 3e84a18a259e1df35e5b549ab92ec3baf82ff010 ] When probed after the HDMI notifier, calling cec_notifier_cec_adap_register() calls the enable() adapter callback, but the HW is not yet set up. Moving cec_notifier_cec_adap_register() right before cec_register_adapter() fixes the following crash: Ignoring spurious kernel translation fault at virtual address 0000000000000008 [...] Hardware name: Khadas VIM (DT) [...] pc : __do_kernel_fault+0xdc/0x120 lr : __do_kernel_fault+0xdc/0x120 [...] Call trace: __do_kernel_fault+0xdc/0x120 do_page_fault+0x180/0x458 do_translation_fault+0x64/0x70 do_mem_abort+0x3c/0x98 el1_da+0x20/0x94 meson_ao_cec_adap_enable+0x30/0x218 [ao_cec] __cec_s_phys_addr+0x184/0x270 cec_s_phys_addr+0x44/0x60 cec_notifier_cec_adap_register+0x68/0x90 meson_ao_cec_probe+0xb0/0x288 [ao_cec] [...] el0_svc_compat+0x8/0x10 Reported-by: Christian Hewitt Suggested-by: Hans Verkuil Fixes: 20958f9d5c48 ("media: meson/ao-cec: use cec_notifier_cec_adap_(un)register") Signed-off-by: Neil Armstrong Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/meson/ao-cec-g12a.c | 36 +++++++++++----------- drivers/media/platform/meson/ao-cec.c | 30 +++++++++--------- 2 files changed, 33 insertions(+), 33 deletions(-) diff --git a/drivers/media/platform/meson/ao-cec-g12a.c b/drivers/media/platform/meson/ao-cec-g12a.c index 3b39e875292e4..3d8fe854feb0a 100644 --- a/drivers/media/platform/meson/ao-cec-g12a.c +++ b/drivers/media/platform/meson/ao-cec-g12a.c @@ -662,34 +662,27 @@ static int meson_ao_cec_g12a_probe(struct platform_device *pdev) if (IS_ERR(ao_cec->adap)) return PTR_ERR(ao_cec->adap); - ao_cec->notify = cec_notifier_cec_adap_register(hdmi_dev, NULL, - ao_cec->adap); - if (!ao_cec->notify) { - ret = -ENOMEM; - goto out_probe_adapter; - } - ao_cec->adap->owner = THIS_MODULE; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) { ret = PTR_ERR(base); - goto out_probe_notify; + goto out_probe_adapter; } ao_cec->regmap = devm_regmap_init_mmio(&pdev->dev, base, &meson_ao_cec_g12a_regmap_conf); if (IS_ERR(ao_cec->regmap)) { ret = PTR_ERR(ao_cec->regmap); - goto out_probe_notify; + goto out_probe_adapter; } ao_cec->regmap_cec = devm_regmap_init(&pdev->dev, NULL, ao_cec, &meson_ao_cec_g12a_cec_regmap_conf); if (IS_ERR(ao_cec->regmap_cec)) { ret = PTR_ERR(ao_cec->regmap_cec); - goto out_probe_notify; + goto out_probe_adapter; } irq = platform_get_irq(pdev, 0); @@ -699,45 +692,52 @@ static int meson_ao_cec_g12a_probe(struct platform_device *pdev) 0, NULL, ao_cec); if (ret) { dev_err(&pdev->dev, "irq request failed\n"); - goto out_probe_notify; + goto out_probe_adapter; } ao_cec->oscin = devm_clk_get(&pdev->dev, "oscin"); if (IS_ERR(ao_cec->oscin)) { dev_err(&pdev->dev, "oscin clock request failed\n"); ret = PTR_ERR(ao_cec->oscin); - goto out_probe_notify; + goto out_probe_adapter; } ret = meson_ao_cec_g12a_setup_clk(ao_cec); if (ret) - goto out_probe_notify; + goto out_probe_adapter; ret = clk_prepare_enable(ao_cec->core); if (ret) { dev_err(&pdev->dev, "core clock enable failed\n"); - goto out_probe_notify; + goto out_probe_adapter; } device_reset_optional(&pdev->dev); platform_set_drvdata(pdev, ao_cec); + ao_cec->notify = cec_notifier_cec_adap_register(hdmi_dev, NULL, + ao_cec->adap); + if (!ao_cec->notify) { + ret = -ENOMEM; + goto out_probe_core_clk; + } + ret = cec_register_adapter(ao_cec->adap, &pdev->dev); if (ret < 0) - goto out_probe_core_clk; + goto out_probe_notify; /* Setup Hardware */ regmap_write(ao_cec->regmap, CECB_GEN_CNTL_REG, CECB_GEN_CNTL_RESET); return 0; -out_probe_core_clk: - clk_disable_unprepare(ao_cec->core); - out_probe_notify: cec_notifier_cec_adap_unregister(ao_cec->notify); +out_probe_core_clk: + clk_disable_unprepare(ao_cec->core); + out_probe_adapter: cec_delete_adapter(ao_cec->adap); diff --git a/drivers/media/platform/meson/ao-cec.c b/drivers/media/platform/meson/ao-cec.c index 64ed549bf0120..03600e8b3ef00 100644 --- a/drivers/media/platform/meson/ao-cec.c +++ b/drivers/media/platform/meson/ao-cec.c @@ -624,20 +624,13 @@ static int meson_ao_cec_probe(struct platform_device *pdev) if (IS_ERR(ao_cec->adap)) return PTR_ERR(ao_cec->adap); - ao_cec->notify = cec_notifier_cec_adap_register(hdmi_dev, NULL, - ao_cec->adap); - if (!ao_cec->notify) { - ret = -ENOMEM; - goto out_probe_adapter; - } - ao_cec->adap->owner = THIS_MODULE; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ao_cec->base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(ao_cec->base)) { ret = PTR_ERR(ao_cec->base); - goto out_probe_notify; + goto out_probe_adapter; } irq = platform_get_irq(pdev, 0); @@ -647,20 +640,20 @@ static int meson_ao_cec_probe(struct platform_device *pdev) 0, NULL, ao_cec); if (ret) { dev_err(&pdev->dev, "irq request failed\n"); - goto out_probe_notify; + goto out_probe_adapter; } ao_cec->core = devm_clk_get(&pdev->dev, "core"); if (IS_ERR(ao_cec->core)) { dev_err(&pdev->dev, "core clock request failed\n"); ret = PTR_ERR(ao_cec->core); - goto out_probe_notify; + goto out_probe_adapter; } ret = clk_prepare_enable(ao_cec->core); if (ret) { dev_err(&pdev->dev, "core clock enable failed\n"); - goto out_probe_notify; + goto out_probe_adapter; } ret = clk_set_rate(ao_cec->core, CEC_CLK_RATE); @@ -674,9 +667,16 @@ static int meson_ao_cec_probe(struct platform_device *pdev) ao_cec->pdev = pdev; platform_set_drvdata(pdev, ao_cec); + ao_cec->notify = cec_notifier_cec_adap_register(hdmi_dev, NULL, + ao_cec->adap); + if (!ao_cec->notify) { + ret = -ENOMEM; + goto out_probe_clk; + } + ret = cec_register_adapter(ao_cec->adap, &pdev->dev); if (ret < 0) - goto out_probe_clk; + goto out_probe_notify; /* Setup Hardware */ writel_relaxed(CEC_GEN_CNTL_RESET, @@ -684,12 +684,12 @@ static int meson_ao_cec_probe(struct platform_device *pdev) return 0; -out_probe_clk: - clk_disable_unprepare(ao_cec->core); - out_probe_notify: cec_notifier_cec_adap_unregister(ao_cec->notify); +out_probe_clk: + clk_disable_unprepare(ao_cec->core); + out_probe_adapter: cec_delete_adapter(ao_cec->adap); -- 2.20.1