(adding back Daniel)
Den 10.02.2020 17.57, skrev Noralf Trønnes:
Den 10.02.2020 16.06, skrev Daniel Vetter:
On Mon, Feb 10, 2020 at 12:37:52PM +0100, Gerd Hoffmann wrote:
Move final cleanups to qxl_drm_release() callback. Add drm_atomic_helper_shutdown() call to qxl_pci_remove().
Signed-off-by: Gerd Hoffmann kraxel@redhat.com
drivers/gpu/drm/qxl/qxl_drv.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c index 1d601f57a6ba..4fda3f9b29f4 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 +133,30 @@ 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;
- /*
* TODO: qxl_device_fini() call should be in qxl_pci_remove(),* reodering qxl_modeset_fini() + qxl_device_fini() calls is* non-trivial though.*/- qxl_modeset_fini(qdev);
So the drm_mode_config_cleanup call in here belongs in ->release, but the qxl_destroy_monitors_object feels like should be perfectly fine in the remove hook. You might need to sprinkle a few drm_dev_enter/exit around to protect code paths thought.
Aside from this lgtm, for the series
Acked-by: Daniel Vetter daniel.vetter@ffwll.ch
And up to you whether you want to fix this or not really.
Btw for testing all these patches that add a ->release hook I think it'd be good if the drm core checks that drm_device->dev is set to NULL, and that we do this in the remove hook. Since that's guaranteed to be gone at that point, so anything in ->release that still needs the device is broken. Ofc maybe do that check only for drivers which have a ->release hook, and we might need a few fixups.
We take a ref on the parent device in drm_dev_init() and release it in drm_dev_fini(). I added this because of the DRM_DEV_* macros we have, to protect access to the device struct after it was unregistered. Setting drm_device->dev to NULL in drm_dev_unregister() instead will provide the same protection I think.
commit 56be6503aab2 drm/drv: Hold ref on parent device during drm_device lifetime
Noralf.
Cheers, Daniel
- 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 +289,8 @@ static struct drm_driver qxl_driver = { .major = 0, .minor = 1, .patchlevel = 0,
- .release = qxl_drm_release,
};
static int __init qxl_init(void)
2.18.1
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