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gpu: nvgpu: add error prints for do_idle() failure

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Add error prints in gk20a_do_idle() to narrow down
the failure point

Bug 200064302

Change-Id: Iffe1151bdc200a79b88e273b3b01523f8e46d130
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/664446
(cherry picked from commit bf1cd9b5551d27cb5cc468795cd147376f48e482)
Reviewed-on: http://git-master/r/666218
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
This commit is contained in:
Deepak Nibade
2014-12-16 17:23:16 +05:30
committed by Dan Willemsen
parent 235f3a3bce
commit d4b3b74044
1 changed files with 8 additions and 3 deletions
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11
drivers/gpu/nvgpu/gk20a/gk20a.c
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@@ -1654,8 +1654,11 @@ int __gk20a_do_idle(struct platform_device *pdev)
ref_cnt = atomic_read(&pdev->dev.power.usage_count);
} while (ref_cnt != 1 && time_before(jiffies, timeout));
if (ref_cnt != 1)
if (ref_cnt != 1) {
gk20a_err(&pdev->dev, "failed to idle - refcount %d != 1\n",
ref_cnt);
goto fail;
}
/*
* if GPU is now idle, we will have only one ref count
@@ -1678,10 +1681,12 @@ int __gk20a_do_idle(struct platform_device *pdev)
is_railgated = platform->is_railgated(pdev);
} while (!is_railgated && time_before(jiffies, timeout));
if (is_railgated)
if (is_railgated) {
return 0;
else
} else {
gk20a_err(&pdev->dev, "failed to idle in timeout\n");
goto fail_timeout;
}
} else {
if (!platform->reset_assert || !platform->reset_deassert)
goto fail_timeout;