From: Alex Deucher <alexdeucher@gmail.com>
To: amd-gfx list <amd-gfx@lists.freedesktop.org>
Cc: Alex Deucher <alexander.deucher@amd.com>
Subject: Re: [PATCH] drm/amdgpu: return an error for hw access in INFO ioctl when in reset
Date: Wed, 1 Jul 2020 01:33:37 -0400 [thread overview]
Message-ID: <CADnq5_MzKqWxOdzGSVUWU3cJaXwXNNB3T0igMP8dyRpLMGpgEw@mail.gmail.com> (raw)
In-Reply-To: <20200626140423.1425349-1-alexander.deucher@amd.com>
ping?
On Fri, Jun 26, 2020 at 10:04 AM Alex Deucher <alexdeucher@gmail.com> wrote:
>
> When the GPU is in reset, accessing the hw is unreliable and could
> interfere with the reset. Return an error in those cases.
>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> index 341d072edd95..fd51d6554ee2 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> @@ -684,6 +684,9 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
> if (info->read_mmr_reg.count > 128)
> return -EINVAL;
>
> + if (adev->in_gpu_reset)
> + return -EPERM;
> +
> regs = kmalloc_array(info->read_mmr_reg.count, sizeof(*regs), GFP_KERNEL);
> if (!regs)
> return -ENOMEM;
> @@ -854,6 +857,9 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
> if (!adev->pm.dpm_enabled)
> return -ENOENT;
>
> + if (adev->in_gpu_reset)
> + return -EPERM;
> +
> switch (info->sensor_info.type) {
> case AMDGPU_INFO_SENSOR_GFX_SCLK:
> /* get sclk in Mhz */
> --
> 2.25.4
>
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next prev parent reply other threads:[~2020-07-01 5:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-26 14:04 [PATCH] drm/amdgpu: return an error for hw access in INFO ioctl when in reset Alex Deucher
2020-07-01 5:33 ` Alex Deucher [this message]
2020-07-01 8:20 ` Christian König
2020-07-01 14:34 ` Li, Dennis
2020-07-03 6:05 ` Felix Kuehling
2020-07-03 7:50 ` Christian König
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