ret = amdgpu_vm_validate_pt_bos(adev, vm, amdgpu_amdkfd_validate,
                                        ¶m);
        if (ret) {
-               pr_err("amdgpu: failed to validate PT BOs\n");
+               pr_err("failed to validate PT BOs\n");
                return ret;
        }
 
        ret = amdgpu_amdkfd_validate(¶m, pd);
        if (ret) {
-               pr_err("amdgpu: failed to validate PD\n");
+               pr_err("failed to validate PD\n");
                return ret;
        }
 
        if (vm->use_cpu_for_update) {
                ret = amdgpu_bo_kmap(pd, NULL);
                if (ret) {
-                       pr_err("amdgpu: failed to kmap PD, ret=%d\n", ret);
+                       pr_err("failed to kmap PD, ret=%d\n", ret);
                        return ret;
                }
        }
 
                return;
 
        if (state == VGA_SWITCHEROO_ON) {
-               pr_info("amdgpu: switched on\n");
+               pr_info("switched on\n");
                /* don't suspend or resume card normally */
                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 
                dev->switch_power_state = DRM_SWITCH_POWER_ON;
                drm_kms_helper_poll_enable(dev);
        } else {
-               pr_info("amdgpu: switched off\n");
+               pr_info("switched off\n");
                drm_kms_helper_poll_disable(dev);
                dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
                amdgpu_device_suspend(dev, true);
 
                nvec = pci_alloc_irq_vectors(adev->pdev, 1, 1, flags);
                if (nvec > 0) {
                        adev->irq.msi_enabled = true;
-                       dev_dbg(adev->dev, "amdgpu: using MSI/MSI-X.\n");
+                       dev_dbg(adev->dev, "using MSI/MSI-X.\n");
                }
        }
 
 
 
        r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(44));
        if (r) {
-               dev_warn(adev->dev, "amdgpu: No suitable DMA available.\n");
+               dev_warn(adev->dev, "No suitable DMA available.\n");
                return r;
        }
        adev->need_swiotlb = drm_need_swiotlb(44);
 
 
        r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(40));
        if (r) {
-               pr_warn("amdgpu: No suitable DMA available\n");
+               pr_warn("No suitable DMA available\n");
                return r;
        }
        adev->need_swiotlb = drm_need_swiotlb(40);
 
 
        r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(40));
        if (r) {
-               pr_warn("amdgpu: No suitable DMA available\n");
+               pr_warn("No suitable DMA available\n");
                return r;
        }
        adev->need_swiotlb = drm_need_swiotlb(40);