From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754553AbbE0TMj (ORCPT ); Wed, 27 May 2015 15:12:39 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:42447 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753841AbbE0TBi (ORCPT ); Wed, 27 May 2015 15:01:38 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Daniel Vetter , Jani Nikula , Kamal Mostafa Subject: [PATCH 3.13.y-ckt 62/95] drm/i915: Dont enable CS_PARSER_ERROR interrupts at all Date: Wed, 27 May 2015 12:00:10 -0700 Message-Id: <1432753243-16151-63-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1432753243-16151-1-git-send-email-kamal@canonical.com> References: <1432753243-16151-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.13.11-ckt21 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Daniel Vetter commit 37ef01ab5d24d1d520dc79f6a98099d451c2a901 upstream. We stopped handling them in commit aaecdf611a05cac26a94713bad25297e60225c29 Author: Daniel Vetter Date: Tue Nov 4 15:52:22 2014 +0100 drm/i915: Stop gathering error states for CS error interrupts but just clearing is apparently not enough: A sufficiently dead gpu left behind by firmware (*cough* coreboot *cough*) can keep the gpu in an endless loop of such interrupts, eventually leading to the nmi firing. And definitely to what looks like a machine hang. Since we don't even enable these interrupts on gen5+ let's do the same on earlier platforms. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=93171 Tested-by: Mono Tested-by: info@gluglug.org.uk Reviewed-by: Mika Kuoppala Signed-off-by: Daniel Vetter Signed-off-by: Jani Nikula Signed-off-by: Kamal Mostafa --- drivers/gpu/drm/i915/i915_irq.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 5d28e06..dc79f38 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -3130,14 +3130,12 @@ static int i8xx_irq_postinstall(struct drm_device *dev) ~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | - I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | - I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); + I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT); I915_WRITE16(IMR, dev_priv->irq_mask); I915_WRITE16(IER, I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | - I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT | I915_USER_INTERRUPT); POSTING_READ16(IER); @@ -3301,14 +3299,12 @@ static int i915_irq_postinstall(struct drm_device *dev) I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT | - I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT | - I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT); + I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT); enable_mask = I915_ASLE_INTERRUPT | I915_DISPLAY_PIPE_A_EVENT_INTERRUPT | I915_DISPLAY_PIPE_B_EVENT_INTERRUPT | - I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT | I915_USER_INTERRUPT; if (I915_HAS_HOTPLUG(dev)) { -- 1.9.1