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drm/i915/gtt: Setup vm callbacks late

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If we manage to tangle errorpaths and get call to callbacks,
it is better to defensively keep them as null until object init is
finished so that we get clean null deref on callsite,
instead of more cryptic wreckage with partly initialized vm objects.

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1488295691-9404-5-git-send-email-mika.kuoppala@intel.com
This commit is contained in:
Mika Kuoppala 2017-02-28 17:28:11 +02:00 committed by Mika Kuoppala
parent e71677698b
commit 054b9acde6
1 changed files with 12 additions and 11 deletions
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23
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -1338,11 +1338,6 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
return ret;
}
ppgtt->base.cleanup = gen8_ppgtt_cleanup;
ppgtt->base.unbind_vma = ppgtt_unbind_vma;
ppgtt->base.bind_vma = ppgtt_bind_vma;
ppgtt->debug_dump = gen8_dump_ppgtt;
/* There are only few exceptions for gen >=6. chv and bxt.
* And we are not sure about the latter so play safe for now.
*/
@ -1382,6 +1377,11 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
if (intel_vgpu_active(dev_priv))
gen8_ppgtt_notify_vgt(ppgtt, true);
ppgtt->base.cleanup = gen8_ppgtt_cleanup;
ppgtt->base.unbind_vma = ppgtt_unbind_vma;
ppgtt->base.bind_vma = ppgtt_bind_vma;
ppgtt->debug_dump = gen8_dump_ppgtt;
return 0;
free_scratch:
@ -1808,13 +1808,7 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
if (ret)
return ret;
ppgtt->base.clear_range = gen6_ppgtt_clear_range;
ppgtt->base.insert_entries = gen6_ppgtt_insert_entries;
ppgtt->base.unbind_vma = ppgtt_unbind_vma;
ppgtt->base.bind_vma = ppgtt_bind_vma;
ppgtt->base.cleanup = gen6_ppgtt_cleanup;
ppgtt->base.total = I915_PDES * GEN6_PTES * PAGE_SIZE;
ppgtt->debug_dump = gen6_dump_ppgtt;
gen6_scratch_va_range(ppgtt, 0, ppgtt->base.total);
gen6_write_page_range(ppgtt, 0, ppgtt->base.total);
@ -1825,6 +1819,13 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
return ret;
}
ppgtt->base.clear_range = gen6_ppgtt_clear_range;
ppgtt->base.insert_entries = gen6_ppgtt_insert_entries;
ppgtt->base.unbind_vma = ppgtt_unbind_vma;
ppgtt->base.bind_vma = ppgtt_bind_vma;
ppgtt->base.cleanup = gen6_ppgtt_cleanup;
ppgtt->debug_dump = gen6_dump_ppgtt;
DRM_DEBUG_DRIVER("Allocated pde space (%lldM) at GTT entry: %llx\n",
ppgtt->node.size >> 20,
ppgtt->node.start / PAGE_SIZE);