drm/i915/gt: Use i915_vm_put on ppgtt_create error paths

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Now that the scratch page and page directories have a reference back to
the i915_address_space, we cannot do an immediate free of the ppgtt upon
error as those buffer objects will perform a later i915_vm_put in their
deferred frees.

The downside is that by replacing the onion unwind along the error
paths, the ppgtt cleanup must handle a partially constructed vm. This
includes ensuring that the vm->cleanup is set prior to the error path.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6900
Signed-off-by: Chris Wilson <chris.p.wilson@intel.com>
Fixes: 4d8151ae53 ("drm/i915: Don't free shared locks while shared")
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: <stable@vger.kernel.org> # v5.14+
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220926153333.102195-1-matthew.auld@intel.com
(cherry picked from commit c286558f58)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

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This commit is contained in:

Chris Wilson 2022-09-26 16:33:33 +01:00 • committed by Tvrtko Ursulin

parent a50ab1bbab

commit 20e377e7b2

3 changed files with 41 additions and 36 deletions

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16

drivers/gpu/drm/i915/gt/gen6_ppgtt.c

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58

drivers/gpu/drm/i915/gt/gen8_ppgtt.c

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3

drivers/gpu/drm/i915/gt/intel_gtt.c

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