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authorYan Zheng <zheng.yan@oracle.com>2009-07-22 09:59:00 -0400
committerChris Mason <chris.mason@oracle.com>2009-07-22 09:59:00 -0400
commit33c66f430bfa3a033e70470e4c93f967156b696d (patch)
tree5af7edc4564aa3f32033b364495828eb32b690a7 /drivers/telephony/Kconfig
parente457afec60fdbd86b963d36f4a8a9285088c6043 (diff)
Btrfs: fix locking issue in btrfs_find_next_key
When walking up the tree, btrfs_find_next_key assumes the upper level tree block is properly locked. This isn't always true even path->keep_locks is 1. This is because btrfs_find_next_key may advance path->slots[] several times instead of only once. When 'path->slots[level] >= btrfs_header_nritems(path->nodes[level])' is found, we can't guarantee the original value of 'path->slots[level]' is 'btrfs_header_nritems(path->nodes[level]) - 1'. If it's not, the tree block at 'level + 1' isn't locked. This patch fixes the issue by explicitly checking the locking state, re-searching the tree if it's not locked. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'drivers/telephony/Kconfig')
0 files changed, 0 insertions, 0 deletions