Attachment 142303 Details for Bug 108585 – possible fix

[patch] possible fix

0001-drm-amdgpu-reset-GPU-on-shutdown-for-kexec.patch (text/plain), 1.33 KB, created by Alex Deucher on 2018-10-31 15:13:27 UTC

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Creator: Alex Deucher

Created: 2018-10-31 15:13:27 UTC

Size: 1.33 KB

patch

obsolete

>From 4d7fc6aed0bade5e07f2a87f59aa6f0c50b0ae62 Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Wed, 31 Oct 2018 10:05:01 -0500
>Subject: [PATCH] drm/amdgpu: reset GPU on shutdown for kexec
>
>kexec requires the device to be fully reset so that the
>driver can load again.  The only way to do this is via
>a GPU reset.
>
>bug: https://bugs.freedesktop.org/show_bug.cgi?id=108585
>
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>---
> drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
>diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>index 28781414d71c..4f479d26a861 100644
>--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>@@ -960,6 +960,7 @@ amdgpu_pci_shutdown(struct pci_dev *pdev)
> {
> 	struct drm_device *dev = pci_get_drvdata(pdev);
> 	struct amdgpu_device *adev = dev->dev_private;
>+	int r;
> 
> 	/* if we are running in a VM, make sure the device
> 	 * torn down properly on reboot/shutdown.
>@@ -967,6 +968,9 @@ amdgpu_pci_shutdown(struct pci_dev *pdev)
> 	 * hypervisors so just do this all the time.
> 	 */
> 	amdgpu_device_ip_suspend(adev);
>+	r = amdgpu_asic_reset(adev);
>+	if (r)
>+		DRM_ERROR("amdgpu asic reset on shutdown failed\n");
> }
> 
> static int amdgpu_pmops_suspend(struct device *dev)
>-- 
>2.13.6
>

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