From nobody Fri Dec 19 10:42:20 2025 Received: from mail-pf1-f182.google.com (mail-pf1-f182.google.com [209.85.210.182]) (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 0D7DC15F41B for ; Tue, 27 Aug 2024 17:11:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.182 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724778694; cv=none; b=My8SvsP7dfBKp5DQjAb+IXgRVammWWYBKyOq8WiBaqWEr701YA/3Na9OmLzy1qW7HqaVIOmG4DCS/kphZ9nUU6eoIg09RJcmhM59FlAaDjruNPT8bVX3TuReu+nYJIH5Hagl6t9m8jY8Mr582dsQC5FzjPYeL8CBQGkcffm7tF0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724778694; c=relaxed/simple; bh=hwcAKO0iibtPZF8CUiwMzKWCtbx88883ElUrEobeEmM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=n9PIYEq9wvKKRsST4NnsczDpmZA5knOxVRhwJIVQOHV1zfWsMn3BY0FSnC29ajRFGKdIAY1tjII4Lq8W4hw0kIlk1nNruso+WKMrqZb2ejIZGlRtW5E8w6NAweJ8z1wszreKzMmnZywFB8wHD1LPfd+hppDB0vE97RcwlUppiSs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=Of1t6hNS; arc=none smtp.client-ip=209.85.210.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="Of1t6hNS" Received: by mail-pf1-f182.google.com with SMTP id d2e1a72fcca58-7141b04e7a3so4737630b3a.3 for ; Tue, 27 Aug 2024 10:11:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1724778692; x=1725383492; 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; bh=IK8SEiBum8hunhZQDt0oY44SDt3A4Q0KuG3fIX/3rsg=; b=Of1t6hNSG0JezN0kQH2cnusk5uhZ9eINfXkUlumjAonj3wcwYdFPSBYT20sng14oqS 7/N2SqseLaBuDf/de1OSfRGfBBzVRLIJFsyVdkpxHqZ1EgsE9wGt0c8kUTP24qi9asvl GqFt6BrTrS7bxoe5OqmI5bzIvkPQ6AYmeTtgs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724778692; x=1725383492; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=IK8SEiBum8hunhZQDt0oY44SDt3A4Q0KuG3fIX/3rsg=; b=BdqlAvyXHUBI6Rc4FqvbRx+4FGqWtFkL05E2cf1uQ7DOZCVoVV62VVgxHYM6qbxY2X HhKjbMXfMIQGh67RF+CeEM5vxoCA3DvFd6KvdaBe5KA2IYBPyJ4yILDx+wvYmrgbhJtR D28V5S0ynjbAR0MkNMHVyFCUhNGKK5LCT+ZezDtv4Chhuu3XD4XqH36D+WQ9DvJfaKrr dL++p4ZjFKoaAgMMiR5sDF8vatwRnq+kKcaUWOvexu0nzKCwCzbN4WLbtXLke6xPzJzj SQCLwItWwmT+7V8OkBq7MZXH5f69CjysKAHY3QhJcu1t7kD6ynRJqnxdM76NkH3czbTG hszQ== X-Forwarded-Encrypted: i=1; AJvYcCVPANYtlSxwbuV6SmamxYToF4ELJPxqgcLmBVFVkIwak+W3m3jub8688E9qinKS2tWd0HDtFF8hwePLjs8=@vger.kernel.org X-Gm-Message-State: AOJu0YwAgzmZe2FLvztJlVGovLYVHRGcIpO07sbOMxMk8o9YYX5NK1ti hZQYRR9WpOjwsHEfTV/fsd3viSVQIbmXrVrw+zDX8YGs4akxKW+1m7L/t7eIng== X-Google-Smtp-Source: AGHT+IG4YPDdFUYtuMPkwkokpmaThrJJFJG1W58Oml09/8xPYFTHvK1DWSTRwqLa9pqAVl8Dy0b24w== X-Received: by 2002:a05:6a00:918b:b0:70d:2b95:d9cd with SMTP id d2e1a72fcca58-714457d35c7mr14736149b3a.16.1724778692187; Tue, 27 Aug 2024 10:11:32 -0700 (PDT) Received: from localhost ([2a00:79e0:2e14:7:9f27:3f59:914a:3d90]) by smtp.gmail.com with UTF8SMTPSA id d2e1a72fcca58-71434330425sm8813341b3a.190.2024.08.27.10.11.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 27 Aug 2024 10:11:31 -0700 (PDT) From: Brian Norris To: Mark Brown Cc: Jon Lin , =?UTF-8?q?Ond=C5=99ej=20Jirman?= , Brian Norris , stable@vger.kernel.org, Heiko Stuebner , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-spi@vger.kernel.org, shengfei Xu Subject: [PATCH v3] spi: rockchip: Resolve unbalanced runtime PM / system PM handling Date: Tue, 27 Aug 2024 10:11:16 -0700 Message-ID: <20240827171126.1115748-1-briannorris@chromium.org> X-Mailer: git-send-email 2.46.0.295.g3b9ea8a38a-goog Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Commit e882575efc77 ("spi: rockchip: Suspend and resume the bus during NOIRQ_SYSTEM_SLEEP_PM ops") stopped respecting runtime PM status and simply disabled clocks unconditionally when suspending the system. This causes problems when the device is already runtime suspended when we go to sleep -- in which case we double-disable clocks and produce a WARNing. Switch back to pm_runtime_force_{suspend,resume}(), because that still seems like the right thing to do, and the aforementioned commit makes no explanation why it stopped using it. Also, refactor some of the resume() error handling, because it's not actually a good idea to re-disable clocks on failure. Fixes: e882575efc77 ("spi: rockchip: Suspend and resume the bus during NOIR= Q_SYSTEM_SLEEP_PM ops") Cc: Reported-by: "Ond=C5=99ej Jirman" Closes: https://lore.kernel.org/lkml/20220621154218.sau54jeij4bunf56@core/ Signed-off-by: Brian Norris --- Changes in v3: - actually CC the appropriate lists (sorry, I accidentally dropped them on v2) Changes in v2: - fix unused 'rs' warning drivers/spi/spi-rockchip.c | 23 +++++++---------------- 1 file changed, 7 insertions(+), 16 deletions(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index e1ecd96c7858..0bb33c43b1b4 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -945,14 +945,16 @@ static int rockchip_spi_suspend(struct device *dev) { int ret; struct spi_controller *ctlr =3D dev_get_drvdata(dev); - struct rockchip_spi *rs =3D spi_controller_get_devdata(ctlr); =20 ret =3D spi_controller_suspend(ctlr); if (ret < 0) return ret; =20 - clk_disable_unprepare(rs->spiclk); - clk_disable_unprepare(rs->apb_pclk); + ret =3D pm_runtime_force_suspend(dev); + if (ret < 0) { + spi_controller_resume(ctlr); + return ret; + } =20 pinctrl_pm_select_sleep_state(dev); =20 @@ -963,25 +965,14 @@ static int rockchip_spi_resume(struct device *dev) { int ret; struct spi_controller *ctlr =3D dev_get_drvdata(dev); - struct rockchip_spi *rs =3D spi_controller_get_devdata(ctlr); =20 pinctrl_pm_select_default_state(dev); =20 - ret =3D clk_prepare_enable(rs->apb_pclk); + ret =3D pm_runtime_force_resume(dev); if (ret < 0) return ret; =20 - ret =3D clk_prepare_enable(rs->spiclk); - if (ret < 0) - clk_disable_unprepare(rs->apb_pclk); - - ret =3D spi_controller_resume(ctlr); - if (ret < 0) { - clk_disable_unprepare(rs->spiclk); - clk_disable_unprepare(rs->apb_pclk); - } - - return 0; + return spi_controller_resume(ctlr); } #endif /* CONFIG_PM_SLEEP */ =20 --=20 2.46.0.295.g3b9ea8a38a-goog