[PATCH 1/1] drm/i915: Split off pci_driver.remove() tail to drm_driver.release()

[Janusz Krzysztofik]

In order to support driver hot unbind, some cleanup operations, now
performed on PCI driver remove, must be called later, after all device
file descriptors are closed.

Split out those operations from the tail of pci_driver.remove()
callback and put them into drm_driver.release() which is called as soon
as all references to the driver are put.  As a result, those cleanups
will be now run on last drm_dev_put(), either still called from
pci_driver.remove() if all device file descriptors are already closed,
or on last drm_release() file operation.

Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c | 17 +++++++++++++----
 drivers/gpu/drm/i915/i915_gem.c |  1 -
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 83d2eb9e74cb..e0dd09dd0f6a 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -738,6 +738,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
 
 cleanup_gem:
 	i915_gem_suspend(dev_priv);
+	i915_gem_suspend_late(dev_priv);
 	i915_gem_fini(dev_priv);
 cleanup_modeset:
 	intel_modeset_cleanup(dev);
@@ -1685,7 +1686,6 @@ static void i915_driver_cleanup_hw(struct drm_i915_private *dev_priv)
 		pci_disable_msi(pdev);
 
 	pm_qos_remove_request(&dev_priv->pm_qos);
-	i915_ggtt_cleanup_hw(dev_priv);
 }
 
 /**
@@ -1909,6 +1909,7 @@ int i915_driver_load(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 out_cleanup_hw:
 	i915_driver_cleanup_hw(dev_priv);
+	i915_ggtt_cleanup_hw(dev_priv);
 out_cleanup_mmio:
 	i915_driver_cleanup_mmio(dev_priv);
 out_runtime_pm_put:
@@ -1960,21 +1961,29 @@ void i915_driver_unload(struct drm_device *dev)
 	cancel_delayed_work_sync(&dev_priv->gpu_error.hangcheck_work);
 	i915_reset_error_state(dev_priv);
 
-	i915_gem_fini(dev_priv);
+	i915_gem_suspend_late(dev_priv);
 
 	intel_power_domains_fini_hw(dev_priv);
 
 	i915_driver_cleanup_hw(dev_priv);
-	i915_driver_cleanup_mmio(dev_priv);
 
 	enable_rpm_wakeref_asserts(dev_priv);
-	intel_runtime_pm_cleanup(dev_priv);
 }
 
 static void i915_driver_release(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = to_i915(dev);
 
+	disable_rpm_wakeref_asserts(dev_priv);
+
+	i915_gem_fini(dev_priv);
+
+	i915_ggtt_cleanup_hw(dev_priv);
+	i915_driver_cleanup_mmio(dev_priv);
+
+	enable_rpm_wakeref_asserts(dev_priv);
+	intel_runtime_pm_cleanup(dev_priv);
+
 	i915_driver_cleanup_early(dev_priv);
 	i915_driver_destroy(dev_priv);
 }
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 7cafd5612f71..1a351cdb33ab 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4671,7 +4671,6 @@ void i915_gem_fini(struct drm_i915_private *dev_priv)
 {
 	GEM_BUG_ON(dev_priv->gt.awake);
 
-	i915_gem_suspend_late(dev_priv);
 	intel_disable_gt_powersave(dev_priv);
 
 	/* Flush any outstanding unpin_work. */
-- 
2.21.0