From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, lu hua , Daniel Vetter , Jesse Barnes , Paul Menzel , Jani Nikula Subject: [PATCH 3.14 22/98] drm/i915: Dont complain about stolen conflicts on gen3 Date: Sun, 25 Jan 2015 10:06:40 -0800 Message-Id: <20150125180713.836834613@linuxfoundation.org> In-Reply-To: <20150125180712.859646324@linuxfoundation.org> References: <20150125180712.859646324@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Daniel Vetter commit 0b6d24c01932db99fc95304235e751e7f7625c41 upstream. Apparently stuff works that way on those machines. I agree with Chris' concern that this is a bit risky but imo worth a shot in -next just for fun. Afaics all these machines have the pci resources allocated like that by the BIOS, so I suspect that it's all ok. This regression goes back to commit eaba1b8f3379b5d100bd146b9a41d28348bdfd09 Author: Chris Wilson Date: Thu Jul 4 12:28:35 2013 +0100 drm/i915: Verify that our stolen memory doesn't conflict Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76983 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71031 Tested-by: lu hua Signed-off-by: Daniel Vetter Reviewed-by: Jesse Barnes Tested-by: Paul Menzel Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/i915_gem_stolen.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/i915/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c @@ -137,7 +137,11 @@ static unsigned long i915_stolen_to_phys r = devm_request_mem_region(dev->dev, base + 1, dev_priv->gtt.stolen_size - 1, "Graphics Stolen Memory"); - if (r == NULL) { + /* + * GEN3 firmware likes to smash pci bridges into the stolen + * range. Apparently this works. + */ + if (r == NULL && !IS_GEN3(dev)) { DRM_ERROR("conflict detected with stolen region: [0x%08x - 0x%08x]\n", base, base + (uint32_t)dev_priv->gtt.stolen_size); base = 0;