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gpu: nvgpu: skip nvlink shutdown on invalid gpu state

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A dGPU can disappear from PCI bus for various reasons. This is
detected while accessing GPU registers and system is rebooted.
If dGPU has disappeared from the system, driver shutdown cannot
access dGPU registers. Skip any such de-initialization (nvlink)
done during shutdown.

Bug 200505461

Change-Id: Ief2e84212421093e57e63ff5958b209bd6857db9
Signed-off-by: Nitin Kumbhar <nkumbhar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2093302
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Nitin Kumbhar
2019-04-09 15:39:13 +05:30
committed by mobile promotions
parent 66cb9495a5
commit 6789a862e6
3 changed files with 16 additions and 3 deletions
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7
drivers/gpu/nvgpu/os/linux/pci.c
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@@ -747,8 +747,11 @@ void nvgpu_pci_shutdown(struct pci_dev *pdev)
if (gk20a_gpu_is_virtual(dev))
return;
err = nvgpu_nvlink_deinit(g);
WARN(err, "gpu failed to remove nvlink");
if (is_nvgpu_gpu_state_valid(g)) {
err = nvgpu_nvlink_deinit(g);
WARN(err, "gpu failed to remove nvlink");
} else
nvgpu_err(g, "skipped nvlink deinit");
nvgpu_info(g, "shut down complete");
}