drm/amdgpu: partial revert VRAM lost handling v2

Keep blocking the CS, but revert everything else. Mapping BOs and info IOCTL
are harmless and can still happen even when VRAM content ist lost.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 10 insertions, 4 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 82e8d43b235a..f759836d10ef 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -270,7 +270,6 @@ static int amdgpu_firmware_info(struct drm_amdgpu_info_firmware *fw_info,
 static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 {
         struct amdgpu_device *adev = dev->dev_private;
-        struct amdgpu_fpriv *fpriv = filp->driver_priv;
         struct drm_amdgpu_info *info = data;
         struct amdgpu_mode_info *minfo = &adev->mode_info;
         void __user *out = (void __user *)(uintptr_t)info->return_pointer;
@@ -283,8 +282,6 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
 
         if (!info->return_size || !info->return_pointer)
                 return -EINVAL;
-        if (amdgpu_kms_vram_lost(adev, fpriv))
-                return -ENODEV;
 
         switch (info->query) {
         case AMDGPU_INFO_ACCEL_WORKING:
@@ -792,10 +789,19 @@ void amdgpu_driver_lastclose_kms(struct drm_device *dev)
         vga_switcheroo_process_delayed_switch();
 }
 
+/**
+ * amdgpu_kms_vram_lost - check if VRAM was lost for this client
+ *
+ * @adev: amdgpu device
+ * @fpriv: client private
+ *
+ * Check if all CS is blocked for the client because of lost VRAM
+ */
 bool amdgpu_kms_vram_lost(struct amdgpu_device *adev,
                           struct amdgpu_fpriv *fpriv)
 {
-        return fpriv->vram_lost_counter != atomic_read(&adev->vram_lost_counter);
+        return fpriv->vram_lost_counter !=
+                atomic_read(&adev->vram_lost_counter);
 }
 
 /**