Re: [PATCH 4/5] drm/i915: Fixup global gtt cleanup

Imre Deak
2014-06-06T13:22:23Z

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On Thu, 2014-06-05 at 16:58 +0200, Daniel Vetter wrote:
> The global gtt is setup up in 2 parts, so we need to be careful
> with the cleanup. For consistency shovel it all into the ->cleanup
> callback, like with ppgtt.
>
> Noticed because it blew up in the out_gtt: cleanup code while
> fiddling with the vgacon code.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Reviewed-by: Imre Deak <imre.deak@intel.com>

> ---
> drivers/gpu/drm/i915/i915_dma.c | 4 ----
> drivers/gpu/drm/i915/i915_gem_gtt.c | 9 ++++++++-
> 2 files changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index b9159ade5e85..27fe65ac5940 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -1386,7 +1386,6 @@ cleanup_gem:
> i915_gem_context_fini(dev);
> mutex_unlock(&dev->struct_mutex);
> WARN_ON(dev_priv->mm.aliasing_ppgtt);
> - drm_mm_takedown(&dev_priv->gtt.base.mm);
> cleanup_irq:
> drm_irq_uninstall(dev);
> cleanup_gem_stolen:
> @@ -1756,8 +1755,6 @@ out_mtrrfree:
> arch_phys_wc_del(dev_priv->gtt.mtrr);
> io_mapping_free(dev_priv->gtt.mappable);
> out_gtt:
> - list_del(&dev_priv->gtt.base.global_link);
> - drm_mm_takedown(&dev_priv->gtt.base.mm);
> dev_priv->gtt.base.cleanup(&dev_priv->gtt.base);
> out_regs:
> intel_uncore_fini(dev);
> @@ -1846,7 +1843,6 @@ int i915_driver_unload(struct drm_device *dev)
> i915_free_hws(dev);
> }
>
> - list_del(&dev_priv->gtt.base.global_link);
> WARN_ON(!list_empty(&dev_priv->vm_list));
>
> drm_vblank_cleanup(dev);
> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
> index 931b906f292a..41e864ec5632 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> @@ -1985,7 +1985,10 @@ static void gen6_gmch_remove(struct i915_address_space *vm)
>
> struct i915_gtt *gtt = container_of(vm, struct i915_gtt, base);
>
> - drm_mm_takedown(&vm->mm);
> + if (drm_mm_initialized(&vm->mm)) {
> + drm_mm_takedown(&vm->mm);
> + list_del(&vm->global_link);
> + }
> iounmap(gtt->gsm);
> teardown_scratch_page(vm->dev);
> }
> @@ -2018,6 +2021,10 @@ static int i915_gmch_probe(struct drm_device *dev,
>
> static void i915_gmch_remove(struct i915_address_space *vm)
> {
> + if (drm_mm_initialized(&vm->mm)) {
> + drm_mm_takedown(&vm->mm);
> + list_del(&vm->global_link);
> + }
> intel_gmch_remove();
> }
>

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