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From 5fcc1dee443acd74bee3e2d7040e1cf2fe2b4dd7 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Thu, 1 Nov 2018 00:02:01 -0500
Subject: [PATCH 1059/2940] drm/amdgpu: check if we need to reset at init time
(v2)
To deal with situations like kexec or GPU VM passthrough
where the device may have been used previously without a
proper GPU reset between.
v2: rebase
bug: https://bugs.freedesktop.org/show_bug.cgi?id=108585
bug: https://bugs.freedesktop.org/show_bug.cgi?id=108754
Reviewed-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 2c9617b7d20f..2d04830daba1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2599,6 +2599,17 @@ int amdgpu_device_init(struct amdgpu_device *adev,
/* detect if we are with an SRIOV vbios */
amdgpu_device_detect_sriov_bios(adev);
+ /* check if we need to reset the asic
+ * E.g., driver was not cleanly unloaded previously, etc.
+ */
+ if (amdgpu_asic_need_reset_on_init(adev)) {
+ r = amdgpu_asic_reset(adev);
+ if (r) {
+ dev_err(adev->dev, "asic reset on init failed\n");
+ goto failed;
+ }
+ }
+
/* Post card if necessary */
if (amdgpu_device_need_post(adev)) {
if (!adev->bios) {
--
2.17.1
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