On Fri, 4 Sep 2020 at 15:40, Daniel Vetter <daniel.vetter@xxxxxxxx> wrote:
>
> The big change is device_add so that device_del can auto-cleanup
> devres resources. This allows us to use devm_drm_dev_alloc, which
> removes the last user of drm_dev_init.
>
> v2: Rebased
>
> v3: use devres_open/release_group so we can use devm without real
> hacks in the driver core or having to create an entire fake bus for
> testing drivers. Might want to extract this into helpers eventually,
> maybe as a mock_drm_dev_alloc or test_drm_dev_alloc.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> ---
> .../gpu/drm/i915/selftests/mock_gem_device.c | 42 +++++++++++--------
> 1 file changed, 25 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
> index fbb403edb7a0..164ad1746da9 100644
> --- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
> +++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
> @@ -128,12 +128,6 @@ struct drm_i915_private *mock_gem_device(void)
> pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
> if (!pdev)
> return NULL;
> - i915 = kzalloc(sizeof(*i915), GFP_KERNEL);
> - if (!i915) {
> - kfree(pdev);
> - return NULL;
> - }
> -
> device_initialize(&pdev->dev);
> pdev->class = PCI_BASE_CLASS_DISPLAY << 16;
> pdev->dev.release = release_dev;
> @@ -146,8 +140,29 @@ struct drm_i915_private *mock_gem_device(void)
> iommu.priv = (void *)-1;
> pdev->dev.iommu = &iommu;
> #endif
> + err = device_add(&pdev->dev);
> + if (err) {
> + kfree(pdev);
> + return NULL;
> + }
> +
> + if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
> + device_del(&pdev->dev);
> + return NULL;
> + }
> +
> + i915 = devm_drm_dev_alloc(&pdev->dev, &mock_driver,
> + struct drm_i915_private, drm);
> + if (err) {
if (IS_ERR(i915))
?
> + pr_err("Failed to allocate mock GEM device: err=%d\n", err);
> + devres_release_group(&pdev->dev, NULL);
> + device_del(&pdev->dev);
> +
> + return NULL;
> + }
>
> pci_set_drvdata(pdev, i915);
> + i915->drm.pdev = pdev;
>
> dev_pm_domain_set(&pdev->dev, &pm_domain);
> pm_runtime_enable(&pdev->dev);
> @@ -155,16 +170,6 @@ struct drm_i915_private *mock_gem_device(void)
> if (pm_runtime_enabled(&pdev->dev))
> WARN_ON(pm_runtime_get_sync(&pdev->dev));
>
> - err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev);
> - if (err) {
> - pr_err("Failed to initialise mock GEM device: err=%d\n", err);
> - put_device(&pdev->dev);
> - kfree(i915);
> -
> - return NULL;
> - }
> - i915->drm.pdev = pdev;
> - drmm_add_final_kfree(&i915->drm, i915);
>
> i915_params_copy(&i915->params, &i915_modparams);
>
> @@ -231,5 +236,8 @@ struct drm_i915_private *mock_gem_device(void)
>
> void mock_destroy_device(struct drm_i915_private *i915)
> {
> - drm_dev_put(&i915->drm);
> + struct device *dev = i915->drm.dev;
> +
> + devres_release_group(dev, NULL);
> + device_del(dev);
> }
> --
> 2.28.0
>
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> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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