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drm/i915/ttm: Return some errors instead of trying memcpy move
The i915_ttm_accel_move() function may return error codes that should
be propagated further up the stack rather than consumed assuming that
the accel move failed and could be replaced with a memcpy move.
For -EINTR, -ERESTARTSYS and -EAGAIN, just propagate those codes, rather
than retrying with a memcpy move.
Fixes: 2b0a750caf
("drm/i915/ttm: Failsafe migration blits")
Cc: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220201070340.16457-1-thomas.hellstrom@linux.intel.com
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@ -436,12 +436,18 @@ __i915_ttm_move(struct ttm_buffer_object *bo,
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if (!IS_ERR(fence))
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goto out;
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} else if (move_deps) {
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int err = i915_deps_sync(move_deps, ctx);
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} else {
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int err = PTR_ERR(fence);
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if (err == -EINTR || err == -ERESTARTSYS || err == -EAGAIN)
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return fence;
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if (move_deps) {
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err = i915_deps_sync(move_deps, ctx);
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if (err)
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return ERR_PTR(err);
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}
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}
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/* Error intercept failed or no accelerated migration to start with */
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if (!copy_work)
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