With this we can drop the final kfree from the release function.
The mock device in the selftests needed it's pci_device split up from the drm_device. In the future we could simplify this again by allocating the pci_device as a managed allocation too.
v2: I overlooked that i915_driver_destroy is also called in the unwind code of the error path. There we need a drm_dev_put. Similar for the mock object.
Now the problem with that is that the drm_driver->release callbacks for both the real driver and the mock one assume everything has been set up. Hence going through that path for a partially set up driver will result in issues. Quickest fix is to disable the ->release() hook until the driver is fully initialized, and keep the onion unwinding. Long term would be cleanest to move everything over to drmm_ release actions, but that's a lot of work for a big driver like i915. Plus more core work needed first anyway.
Signed-off-by: Daniel Vetter daniel.vetter@intel.com Cc: Jani Nikula jani.nikula@linux.intel.com Cc: Joonas Lahtinen joonas.lahtinen@linux.intel.com Cc: Rodrigo Vivi rodrigo.vivi@intel.com Cc: Chris Wilson chris@chris-wilson.co.uk Cc: Tvrtko Ursulin tvrtko.ursulin@intel.com Cc: Matthew Auld matthew.auld@intel.com Cc: Andi Shyti andi.shyti@intel.com Cc: Mika Kuoppala mika.kuoppala@linux.intel.com Cc: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: Abdiel Janulgue abdiel.janulgue@linux.intel.com Cc: intel-gfx@lists.freedesktop.org --- drivers/gpu/drm/i915/i915_drv.c | 9 ++++++++- drivers/gpu/drm/i915/i915_drv.h | 3 +++ .../gpu/drm/i915/selftests/mock_gem_device.c | 18 +++++++++++++++++- 3 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 050e4d7c6723..61d874b61cb3 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -43,6 +43,7 @@ #include <drm/drm_atomic_helper.h> #include <drm/drm_ioctl.h> #include <drm/drm_irq.h> +#include <drm/drm_managed.h> #include <drm/drm_probe_helper.h> #include <drm/i915_drm.h>
@@ -1363,6 +1364,7 @@ i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent) }
i915->drm.dev_private = i915; + drmm_add_final_kfree(&i915->drm, i915);
i915->drm.pdev = pdev; pci_set_drvdata(pdev, i915); @@ -1382,7 +1384,6 @@ static void i915_driver_destroy(struct drm_i915_private *i915) struct pci_dev *pdev = i915->drm.pdev;
drm_dev_fini(&i915->drm); - kfree(i915); }
/** @@ -1458,6 +1459,8 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
i915_welcome_messages(i915);
+ i915->do_release = true; + return 0;
out_cleanup_hw: @@ -1474,6 +1477,7 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent) out_fini: i915_probe_error(i915, "Device initialization failed (%d)\n", ret); i915_driver_destroy(i915); + drm_dev_put(&i915->drm); return ret; }
@@ -1516,6 +1520,9 @@ static void i915_driver_release(struct drm_device *dev) struct drm_i915_private *dev_priv = to_i915(dev); struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
+ if (!dev_priv->do_release) + return; + disable_rpm_wakeref_asserts(rpm);
i915_gem_driver_release(dev_priv); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 3330b538d379..6e984fd7ae77 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -884,6 +884,9 @@ struct i915_selftest_stash { struct drm_i915_private { struct drm_device drm;
+ /* FIXME: Device release actions should all be moved to drmm_ */ + bool do_release; + const struct intel_device_info __info; /* Use INTEL_INFO() to access. */ struct intel_runtime_info __runtime; /* Use RUNTIME_INFO() to access. */ struct intel_driver_caps caps; diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c index 3b8986983afc..9b06d5ec889a 100644 --- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c +++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c @@ -25,6 +25,8 @@ #include <linux/pm_domain.h> #include <linux/pm_runtime.h>
+#include <drm/drm_managed.h> + #include "gt/intel_gt.h" #include "gt/intel_gt_requests.h" #include "gt/mock_engine.h" @@ -55,6 +57,9 @@ static void mock_device_release(struct drm_device *dev) { struct drm_i915_private *i915 = to_i915(dev);
+ if (!i915->do_release) + return; + mock_device_flush(i915); intel_gt_driver_remove(&i915->gt);
@@ -114,9 +119,14 @@ struct drm_i915_private *mock_gem_device(void) struct pci_dev *pdev; int err;
- pdev = kzalloc(sizeof(*pdev) + sizeof(*i915), GFP_KERNEL); + pdev = kzalloc(sizeof(*pdev), GFP_KERNEL); if (!pdev) goto err; + i915 = kzalloc(sizeof(*i915), GFP_KERNEL); + if (!i915) { + kfree(pdev); + goto err; + }
device_initialize(&pdev->dev); pdev->class = PCI_BASE_CLASS_DISPLAY << 16; @@ -141,10 +151,13 @@ struct drm_i915_private *mock_gem_device(void) err = drm_dev_init(&i915->drm, &mock_driver, &pdev->dev); if (err) { pr_err("Failed to initialise mock GEM device: err=%d\n", err); + kfree(i915); + goto put_device; } i915->drm.pdev = pdev; i915->drm.dev_private = i915; + drmm_add_final_kfree(&i915->drm, i915);
intel_runtime_pm_init_early(&i915->runtime_pm);
@@ -189,6 +202,8 @@ struct drm_i915_private *mock_gem_device(void) __clear_bit(I915_WEDGED, &i915->gt.reset.flags); intel_engines_driver_register(i915);
+ i915->do_release = true; + return i915;
err_context: @@ -200,6 +215,7 @@ struct drm_i915_private *mock_gem_device(void) intel_memory_regions_driver_release(i915); drm_mode_config_cleanup(&i915->drm); drm_dev_fini(&i915->drm); + drm_dev_put(&i915->drm); put_device: put_device(&pdev->dev); err: