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gpu: nvgpu: handle pm_prepare_poweroff failure

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As part of gk20a_pm_prepare_poweroff, gpu hw state
is destroyed even in case of any errors. So try to recover
from that situation by calling gk20a_pm_finalize_poweron.

Bug 200380708

Change-Id: Ibff656cda67241ad111fd22701e05871f20d6f70
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1653750
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
seshendra Gadagottu
2018-02-07 13:26:11 -08:00
committed by mobile promotions
parent cb54d7ca8f
commit 244a124ce2
1 changed files with 6 additions and 4 deletions
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10
drivers/gpu/nvgpu/common/linux/module.c
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@@ -928,23 +928,25 @@ fail:
static int gk20a_pm_runtime_suspend(struct device *dev)
{
int err = 0;
struct gk20a *g = get_gk20a(dev);
if (gk20a_gpu_is_virtual(dev))
err = vgpu_pm_prepare_poweroff(dev);
else
err = gk20a_pm_prepare_poweroff(dev);
if (err)
if (err) {
nvgpu_err(g, "failed to power off, err=%d", err);
goto fail;
}
err = gk20a_pm_railgate(dev);
if (err)
goto fail_railgate;
goto fail;
return 0;
fail_railgate:
gk20a_pm_finalize_poweron(dev);
fail:
gk20a_pm_finalize_poweron(dev);
pm_runtime_mark_last_busy(dev);
return err;
}