From: Thierry Reding treding@nvidia.com
Writing the 0x1704 (BUS_BAR1_BLOCK) register causes the GPU to probe the memory region at the programmed address. The result is an address decode error in the external memory controller because address 0, which is what is written to the register, is not designated as accessible to devices.
Avoid triggering DMA from the GPU by removing teardown of the BAR1.
Signed-off-by: Thierry Reding treding@nvidia.com --- drivers/gpu/drm/nouveau/nvkm/subdev/bar/gm20b.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gm20b.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gm20b.c index 950bff1955ad..1ed6170891c4 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gm20b.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gm20b.c @@ -26,7 +26,6 @@ gm20b_bar_func = { .dtor = gf100_bar_dtor, .oneinit = gf100_bar_oneinit, .bar1.init = gf100_bar_bar1_init, - .bar1.fini = gf100_bar_bar1_fini, .bar1.wait = gm107_bar_bar1_wait, .bar1.vmm = gf100_bar_bar1_vmm, .flush = g84_bar_flush,