Btrfs: drop spin lock when memory alloc fails
Drop spin lock in convert_extent_bit() when memory alloc fails, otherwise, it will be a deadlock. Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
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@ -935,8 +935,10 @@ again:
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node = tree_search(tree, start);
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if (!node) {
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prealloc = alloc_extent_state_atomic(prealloc);
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if (!prealloc)
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return -ENOMEM;
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if (!prealloc) {
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err = -ENOMEM;
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goto out;
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}
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err = insert_state(tree, prealloc, start, end, &bits);
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prealloc = NULL;
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BUG_ON(err == -EEXIST);
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@ -992,8 +994,10 @@ hit_next:
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*/
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if (state->start < start) {
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prealloc = alloc_extent_state_atomic(prealloc);
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if (!prealloc)
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return -ENOMEM;
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if (!prealloc) {
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err = -ENOMEM;
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goto out;
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}
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err = split_state(tree, state, prealloc, start);
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BUG_ON(err == -EEXIST);
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prealloc = NULL;
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@ -1024,8 +1028,10 @@ hit_next:
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this_end = last_start - 1;
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prealloc = alloc_extent_state_atomic(prealloc);
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if (!prealloc)
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return -ENOMEM;
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if (!prealloc) {
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err = -ENOMEM;
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goto out;
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}
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/*
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* Avoid to free 'prealloc' if it can be merged with
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@ -1051,8 +1057,10 @@ hit_next:
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*/
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if (state->start <= end && state->end > end) {
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prealloc = alloc_extent_state_atomic(prealloc);
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if (!prealloc)
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return -ENOMEM;
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if (!prealloc) {
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err = -ENOMEM;
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goto out;
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}
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err = split_state(tree, state, prealloc, end + 1);
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BUG_ON(err == -EEXIST);
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