From: Dave Airlie <[email protected]>
Turns out sashiko was right, and I should protect this properly
Fixes: 34e27b90552a ("nouveau/instmem: use iomapping interface for instmem
handling")
Signed-off-by: Dave Airlie <[email protected]>
---
drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c
b/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c
index f4489efc94a7..22b0fde6ba34 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c
@@ -195,6 +195,9 @@ check_io_mapping(struct nv50_instmem *imem)
{
struct nvkm_device *device = imem->base.subdev.device;
+ if (imem->iomap.size)
+ return true;
+
return io_mapping_init_wc(&imem->iomap,
device->func->resource_addr(device,
NVKM_BAR2_INST),
device->func->resource_size(device,
NVKM_BAR2_INST)) != NULL;
--
2.55.0
