Commit 53d206bb authored May 02, 2014 by Alexandre Courbot Committed by Ben Skeggs Jun 10, 2014

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@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

parent 4c0dae57

drivers/gpu/drm/nouveau/core/subdev/bar/base.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -118,8 +118,10 @@ nouveau_bar_create_(struct nouveau_object *parent,
		if (ret)
		return ret;

		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;
		}

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