Re: [Spice-devel] [PATCH 4/4] drm/qxl: add drm_driver.release callback.

Frediano Ziglio
2019-12-20T12:09:29Z

>
> Move final cleanups to qxl_drm_release() callback.

Can you explain in the commit why this is better or preferable?

> Add drm_atomic_helper_shutdown() call to qxl_pci_remove().

I suppose this is to replace the former manual cleanup calls,
which were moved to qxl_drm_release, I think this could be
added in the commit message ("why"), I don't see much value
in describing "how" this was done.

>
> Reorder calls in qxl_device_fini(). Cleaning up gem & ttm
> might trigger qxl commands, so we should do that before
> releaseing command rings.

Typo: releaseing -> releasing
Why not putting this in a separate commit? Was this behaviour
changed? It does not seem so to me.

>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
> drivers/gpu/drm/qxl/qxl_drv.c | 21 ++++++++++++++-------
> drivers/gpu/drm/qxl/qxl_kms.c | 8 ++++----
> 2 files changed, 18 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
> index 1d601f57a6ba..8044363ba0f2 100644
> --- a/drivers/gpu/drm/qxl/qxl_drv.c
> +++ b/drivers/gpu/drm/qxl/qxl_drv.c
> @@ -34,6 +34,7 @@
> #include <linux/pci.h>
>
> #include <drm/drm.h>
> +#include <drm/drm_atomic_helper.h>
> #include <drm/drm_drv.h>
> #include <drm/drm_file.h>
> #include <drm/drm_modeset_helper.h>
> @@ -132,21 +133,25 @@ qxl_pci_probe(struct pci_dev *pdev, const struct
> pci_device_id *ent)
> return ret;
> }
>
> +static void qxl_drm_release(struct drm_device *dev)
> +{
> + struct qxl_device *qdev = dev->dev_private;
> +
> + qxl_modeset_fini(qdev);
> + qxl_device_fini(qdev);
> + dev->dev_private = NULL;
> + kfree(qdev);
> +}
> +
> static void
> qxl_pci_remove(struct pci_dev *pdev)
> {
> struct drm_device *dev = pci_get_drvdata(pdev);
> - struct qxl_device *qdev = dev->dev_private;
>
> drm_dev_unregister(dev);
> -
> - qxl_modeset_fini(qdev);
> - qxl_device_fini(qdev);
> + drm_atomic_helper_shutdown(dev);
> if (is_vga(pdev))
> vga_put(pdev, VGA_RSRC_LEGACY_IO);
> -
> - dev->dev_private = NULL;
> - kfree(qdev);
> drm_dev_put(dev);
> }
>
> @@ -279,6 +284,8 @@ static struct drm_driver qxl_driver = {
> .major = 0,
> .minor = 1,
> .patchlevel = 0,
> +
> + .release = qxl_drm_release,
> };
>
> static int __init qxl_init(void)
> diff --git a/drivers/gpu/drm/qxl/qxl_kms.c b/drivers/gpu/drm/qxl/qxl_kms.c
> index bfc1631093e9..70b20ee4741a 100644
> --- a/drivers/gpu/drm/qxl/qxl_kms.c
> +++ b/drivers/gpu/drm/qxl/qxl_kms.c
> @@ -299,12 +299,12 @@ void qxl_device_fini(struct qxl_device *qdev)
> {
> qxl_bo_unref(&qdev->current_release_bo[0]);
> qxl_bo_unref(&qdev->current_release_bo[1]);
> - flush_work(&qdev->gc_work);
> - qxl_ring_free(qdev->command_ring);
> - qxl_ring_free(qdev->cursor_ring);
> - qxl_ring_free(qdev->release_ring);
> qxl_gem_fini(qdev);
> qxl_bo_fini(qdev);
> + flush_work(&qdev->gc_work);
> + qxl_ring_free(qdev->command_ring);
> + qxl_ring_free(qdev->cursor_ring);
> + qxl_ring_free(qdev->release_ring);
> io_mapping_free(qdev->surface_mapping);
> io_mapping_free(qdev->vram_mapping);
> iounmap(qdev->ram_header);

Frediano