Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932287AbbBZNub (ORCPT ); Thu, 26 Feb 2015 08:50:31 -0500 Received: from mail-wg0-f45.google.com ([74.125.82.45]:42979 "EHLO mail-wg0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932239AbbBZNu1 (ORCPT ); Thu, 26 Feb 2015 08:50:27 -0500 From: =?UTF-8?q?Pali=20Roh=C3=A1r?= To: =?UTF-8?q?Beno=C3=AEt=20Cousson?= , Tony Lindgren , Rob Herring , Russell King , Paul Walmsley , Herbert Xu , "David S. Miller" Cc: linux-omap@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, Pavel Machek , Nishanth Menon , Ivaylo Dimitrov , Aaro Koskinen , Sebastian Reichel , =?UTF-8?q?Pali=20Roh=C3=A1r?= Subject: [PATCH 01/10] ARM: OMAP2+: Return correct error values from device and hwmod Date: Thu, 26 Feb 2015 14:49:51 +0100 Message-Id: <1424958600-18881-2-git-send-email-pali.rohar@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1424958600-18881-1-git-send-email-pali.rohar@gmail.com> References: <1424958600-18881-1-git-send-email-pali.rohar@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3587 Lines: 148 Without this patch function pm_runtime_get_sync() returns 0 even when some omap subfunction fails. This patch properly propagate error codes from omap functions back to caller. This patch fix problem, when loading omap-aes driver in qemu cause kernel oops. Signed-off-by: Pali Rohár --- arch/arm/mach-omap2/omap_device.c | 30 +++++++++++++++++------------- arch/arm/mach-omap2/omap_hwmod.c | 10 ++++++---- 2 files changed, 23 insertions(+), 17 deletions(-) diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c index be9541e..9fd47a9 100644 --- a/arch/arm/mach-omap2/omap_device.c +++ b/arch/arm/mach-omap2/omap_device.c @@ -224,13 +224,13 @@ static int _omap_device_notifier_call(struct notifier_block *nb, */ static int _omap_device_enable_hwmods(struct omap_device *od) { + int ret = 0; int i; for (i = 0; i < od->hwmods_cnt; i++) - omap_hwmod_enable(od->hwmods[i]); + ret |= omap_hwmod_enable(od->hwmods[i]); - /* XXX pass along return value here? */ - return 0; + return ret; } /** @@ -241,13 +241,13 @@ static int _omap_device_enable_hwmods(struct omap_device *od) */ static int _omap_device_idle_hwmods(struct omap_device *od) { + int ret = 0; int i; for (i = 0; i < od->hwmods_cnt; i++) - omap_hwmod_idle(od->hwmods[i]); + ret |= omap_hwmod_idle(od->hwmods[i]); - /* XXX pass along return value here? */ - return 0; + return ret; } /* Public functions for use by core code */ @@ -595,18 +595,20 @@ static int _od_runtime_suspend(struct device *dev) int ret; ret = pm_generic_runtime_suspend(dev); + if (ret) + return ret; - if (!ret) - omap_device_idle(pdev); - - return ret; + return omap_device_idle(pdev); } static int _od_runtime_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); + int ret; - omap_device_enable(pdev); + ret = omap_device_enable(pdev); + if (ret) + return ret; return pm_generic_runtime_resume(dev); } @@ -740,7 +742,8 @@ int omap_device_enable(struct platform_device *pdev) ret = _omap_device_enable_hwmods(od); - od->_state = OMAP_DEVICE_STATE_ENABLED; + if (ret == 0) + od->_state = OMAP_DEVICE_STATE_ENABLED; return ret; } @@ -770,7 +773,8 @@ int omap_device_idle(struct platform_device *pdev) ret = _omap_device_idle_hwmods(od); - od->_state = OMAP_DEVICE_STATE_IDLE; + if (ret == 0) + od->_state = OMAP_DEVICE_STATE_IDLE; return ret; } diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 92afb72..870e984 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -3350,16 +3350,17 @@ int omap_hwmod_enable(struct omap_hwmod *oh) */ int omap_hwmod_idle(struct omap_hwmod *oh) { + int r; unsigned long flags; if (!oh) return -EINVAL; spin_lock_irqsave(&oh->_lock, flags); - _idle(oh); + r = _idle(oh); spin_unlock_irqrestore(&oh->_lock, flags); - return 0; + return r; } /** @@ -3372,16 +3373,17 @@ int omap_hwmod_idle(struct omap_hwmod *oh) */ int omap_hwmod_shutdown(struct omap_hwmod *oh) { + int r; unsigned long flags; if (!oh) return -EINVAL; spin_lock_irqsave(&oh->_lock, flags); - _shutdown(oh); + r = _shutdown(oh); spin_unlock_irqrestore(&oh->_lock, flags); - return 0; + return r; } /* -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/