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Message-ID: <1399023162-13159-2-git-send-email-acourbot@nvidia.com> Date: Fri, 2 May 2014 18:32:34 +0900 From: Alexandre Courbot <acourbot@...dia.com> To: Ben Skeggs <bskeggs@...hat.com> CC: Thierry Reding <thierry.reding@...il.com>, <nouveau@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>, <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <gnurou@...il.com>, Alexandre Courbot <acourbot@...dia.com> Subject: [PATCH v4 1/9] drm/nouveau/bar: only ioremap BAR3 if it exists Some chips that use system memory exclusively (e.g. GK20A) do not expose 2 BAR regions. For them only BAR1 exists, and it should be used for USERD mapping. Do not map BAR3 if its resource does not exist. Signed-off-by: Alexandre Courbot <acourbot@...dia.com> Reviewed-by: Thierry Reding <treding@...dia.com> --- drivers/gpu/drm/nouveau/core/subdev/bar/base.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/nouveau/core/subdev/bar/base.c b/drivers/gpu/drm/nouveau/core/subdev/bar/base.c index bdf594116f3f..73b1ed20c8d5 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/bar/base.c +++ b/drivers/gpu/drm/nouveau/core/subdev/bar/base.c @@ -118,8 +118,10 @@ nouveau_bar_create_(struct nouveau_object *parent, if (ret) return ret; - bar->iomem = ioremap(nv_device_resource_start(device, 3), - nv_device_resource_len(device, 3)); + if (nv_device_resource_len(device, 3) != 0) + bar->iomem = ioremap(nv_device_resource_start(device, 3), + nv_device_resource_len(device, 3)); + return 0; } -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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