From nobody Sat Nov 30 10:48:41 2024 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BB8BF18E021; Tue, 10 Sep 2024 18:05:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725991537; cv=none; b=akBbZ7XlgkpCR6akXUKGu0ObSrBmxelNn4mVEpjWBBZuSx2lqiOqsJ+IXUzSG3YlXb3qHC7Pmxz38tfbs4OEB1RtNk8/zqDOelINOA/9Llz913rkvPl2ifl0rC6zPRVxpna1dn9dIoCL6WwoaktJK90G1wXMlMq+3AkfYl87UmI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725991537; c=relaxed/simple; bh=MeN1i+aab0NQ3JQYuaxoKtvqWnyl4os7c4ARpZBGstw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=g6UYGltQsJvWDR2aN6NvhEm9VhZrrr6WuDB27ypJtWIDgmwFvXxbVS1sx2TeS9zZaHcI6ngDwGRtxfkQtnMMnFBBPGx7tXLIvv21Ye+nzpwrfpEvkTAqGCkVVZa3VZFN0kYyNW2mwO++M7hGT0t7va2rPq8pHVfYuD3qW/1mvqY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=i/8jHUS5; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="i/8jHUS5" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1725991531; bh=MeN1i+aab0NQ3JQYuaxoKtvqWnyl4os7c4ARpZBGstw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i/8jHUS5okXgNF3JAi1jU6cygrU6Opm/B80l6yR1Sw9wzOW12AHMZe2nUloYKVls0 RX0sfj8KWEdmA4oQA3sf8APJZOjKixPYMeOexlE2C/WH6StB71OJLT2wTgAHZohvWN ZpB2jHBTxnrzA3iZyG1ZZizKkKkb0aUCCkqxsWN1iBfMJZ352ImfxYhUd4y2KPKP/C lSCMhExjqPNUpKJdfgLZR9IRDpn6hRUfZhzxRp3mvm4tCP5gSywZdk9eQ3XWoLax8z 1GVgSRPoNlTkvI7tonujtNsTkKVux1HbxLanySPDiccaI09rUmVGsc7sBvOhLIWHKf VJMvN6SrZzzsw== Received: from jupiter.universe (dyndsl-091-248-215-127.ewe-ip-backbone.de [91.248.215.127]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: sre) by bali.collaboradmins.com (Postfix) with ESMTPSA id D192117E35FA; Tue, 10 Sep 2024 20:05:31 +0200 (CEST) Received: by jupiter.universe (Postfix, from userid 1000) id 8C3084800E4; Tue, 10 Sep 2024 20:05:31 +0200 (CEST) From: Sebastian Reichel To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Ulf Hansson Cc: Elaine Zhang , =?UTF-8?q?Adri=C3=A1n=20Mart=C3=ADnez=20Larumbe?= , Boris Brezillon , devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Sebastian Reichel , kernel@collabora.com Subject: [PATCH v1 1/6] pmdomain: rockchip: forward rockchip_do_pmu_set_power_domain errors Date: Tue, 10 Sep 2024 19:57:10 +0200 Message-ID: <20240910180530.47194-2-sebastian.reichel@collabora.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240910180530.47194-1-sebastian.reichel@collabora.com> References: <20240910180530.47194-1-sebastian.reichel@collabora.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Currently rockchip_do_pmu_set_power_domain prints a warning if there have been errors turning on the power domain, but it does not return any errors and rockchip_pd_power() tries to continue setting up the QOS registers. This usually results in accessing unpowered registers, which triggers an SError and a full system hang. This improves the error handling by forwarding the error to avoid kernel panics. Signed-off-by: Sebastian Reichel Reviewed-by: Heiko Stuebner --- drivers/pmdomain/rockchip/pm-domains.c | 35 +++++++++++++++++--------- 1 file changed, 23 insertions(+), 12 deletions(-) diff --git a/drivers/pmdomain/rockchip/pm-domains.c b/drivers/pmdomain/rock= chip/pm-domains.c index 9b76b62869d0..0f44d698475b 100644 --- a/drivers/pmdomain/rockchip/pm-domains.c +++ b/drivers/pmdomain/rockchip/pm-domains.c @@ -488,16 +488,17 @@ static int rockchip_pmu_domain_mem_reset(struct rockc= hip_pm_domain *pd) return ret; } =20 -static void rockchip_do_pmu_set_power_domain(struct rockchip_pm_domain *pd, - bool on) +static int rockchip_do_pmu_set_power_domain(struct rockchip_pm_domain *pd, + bool on) { struct rockchip_pmu *pmu =3D pd->pmu; struct generic_pm_domain *genpd =3D &pd->genpd; u32 pd_pwr_offset =3D pd->info->pwr_offset; bool is_on, is_mem_on =3D false; + int ret; =20 if (pd->info->pwr_mask =3D=3D 0) - return; + return 0; =20 if (on && pd->info->mem_status_mask) is_mem_on =3D rockchip_pmu_domain_is_mem_on(pd); @@ -512,16 +513,21 @@ static void rockchip_do_pmu_set_power_domain(struct r= ockchip_pm_domain *pd, =20 wmb(); =20 - if (is_mem_on && rockchip_pmu_domain_mem_reset(pd)) - return; + if (is_mem_on) { + ret =3D rockchip_pmu_domain_mem_reset(pd); + if (ret) + return ret; + } =20 - if (readx_poll_timeout_atomic(rockchip_pmu_domain_is_on, pd, is_on, - is_on =3D=3D on, 0, 10000)) { - dev_err(pmu->dev, - "failed to set domain '%s', val=3D%d\n", - genpd->name, is_on); - return; + ret =3D readx_poll_timeout_atomic(rockchip_pmu_domain_is_on, pd, is_on, + is_on =3D=3D on, 0, 10000); + if (ret) { + dev_err(pmu->dev, "failed to set domain '%s' %s, val=3D%d\n", + genpd->name, on ? "on" : "off", is_on); + return ret; } + + return 0; } =20 static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on) @@ -546,7 +552,12 @@ static int rockchip_pd_power(struct rockchip_pm_domain= *pd, bool power_on) rockchip_pmu_set_idle_request(pd, true); } =20 - rockchip_do_pmu_set_power_domain(pd, power_on); + ret =3D rockchip_do_pmu_set_power_domain(pd, power_on); + if (ret < 0) { + clk_bulk_disable(pd->num_clks, pd->clks); + mutex_unlock(&pmu->mutex); + return ret; + } =20 if (power_on) { /* if powering up, leave idle mode */ --=20 2.45.2