drm/nouveau/bar: only ioremap BAR3 if it exists

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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>

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Alexandre Courbot 2014-05-02 18:32:34 +09:00 • committed by Ben Skeggs

parent 4c0dae5787

commit 53d206bb4a

1 changed files with 4 additions and 2 deletions

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

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