From: Imre Deak Date: Tue, 19 Jan 2016 13:26:28 +0000 (+0200) Subject: drm/i915: Sanitize GEM shrinker init and clean-up X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a8a40589257a280b49c7d9b744910036d11aac5d;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915: Sanitize GEM shrinker init and clean-up Factor out the common GEM shrinker clean-up code and call the shrinker init function from the same function from where the corresponding shrinker clean-up function is called. Also add sanity checking to the shrinker and OOM registration calls. Signed-off-by: Imre Deak Reviewed-by: David Weinehall Link: http://patchwork.freedesktop.org/patch/msgid/1453209992-25995-4-git-send-email-imre.deak@intel.com --- diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 5caea9e97fcf..adc5fe728bc5 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1035,6 +1035,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) intel_opregion_setup(dev); i915_gem_load(dev); + i915_gem_shrinker_init(dev_priv); /* On the 945G/GM, the chipset reports the MSI capability on the * integrated graphics even though the support isn't actually there @@ -1098,8 +1099,7 @@ out_power_well: intel_power_domains_fini(dev_priv); drm_vblank_cleanup(dev); out_gem_unload: - WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier)); - unregister_shrinker(&dev_priv->mm.shrinker); + i915_gem_shrinker_cleanup(dev_priv); if (dev->pdev->msi_enabled) pci_disable_msi(dev->pdev); @@ -1152,8 +1152,7 @@ int i915_driver_unload(struct drm_device *dev) i915_teardown_sysfs(dev); - WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier)); - unregister_shrinker(&dev_priv->mm.shrinker); + i915_gem_shrinker_cleanup(dev_priv); io_mapping_free(dev_priv->gtt.mappable); arch_phys_wc_del(dev_priv->gtt.mtrr); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 211af534e5d0..abfb8c9e5a8c 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -3261,6 +3261,7 @@ unsigned long i915_gem_shrink(struct drm_i915_private *dev_priv, #define I915_SHRINK_ACTIVE 0x8 unsigned long i915_gem_shrink_all(struct drm_i915_private *dev_priv); void i915_gem_shrinker_init(struct drm_i915_private *dev_priv); +void i915_gem_shrinker_cleanup(struct drm_i915_private *dev_priv); /* i915_gem_tiling.c */ diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 371bbb28c471..7ce76c24a5c6 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -5100,8 +5100,6 @@ i915_gem_load(struct drm_device *dev) dev_priv->mm.interruptible = true; - i915_gem_shrinker_init(dev_priv); - mutex_init(&dev_priv->fb_tracking.lock); } diff --git a/drivers/gpu/drm/i915/i915_gem_shrinker.c b/drivers/gpu/drm/i915/i915_gem_shrinker.c index 16da9c1422cc..58c1e592bbdb 100644 --- a/drivers/gpu/drm/i915/i915_gem_shrinker.c +++ b/drivers/gpu/drm/i915/i915_gem_shrinker.c @@ -367,8 +367,20 @@ void i915_gem_shrinker_init(struct drm_i915_private *dev_priv) dev_priv->mm.shrinker.scan_objects = i915_gem_shrinker_scan; dev_priv->mm.shrinker.count_objects = i915_gem_shrinker_count; dev_priv->mm.shrinker.seeks = DEFAULT_SEEKS; - register_shrinker(&dev_priv->mm.shrinker); + WARN_ON(register_shrinker(&dev_priv->mm.shrinker)); dev_priv->mm.oom_notifier.notifier_call = i915_gem_shrinker_oom; - register_oom_notifier(&dev_priv->mm.oom_notifier); + WARN_ON(register_oom_notifier(&dev_priv->mm.oom_notifier)); +} + +/** + * i915_gem_shrinker_cleanup - Clean up i915 shrinker + * @dev_priv: i915 device + * + * This function unregisters the i915 shrinker and OOM handler. + */ +void i915_gem_shrinker_cleanup(struct drm_i915_private *dev_priv) +{ + WARN_ON(unregister_oom_notifier(&dev_priv->mm.oom_notifier)); + unregister_shrinker(&dev_priv->mm.shrinker); }