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@xxxxxxxxxx> Reviewed-by: Thierry Reding <treding@xxxxxxxxxx> --- 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 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
