Pull device mapper fix from Mike Snitzer: "Fix for earlier 4.6-rc4 stable@ commit that introduced improper use of write lock in cmd_read_lock() -- due to cut-n-paste gone awry (and sparse didn't catch it)" * tag 'dm-4.6-fix-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm cache metadata: fix cmd_read_lock() acquiring write lock
Unified · Split
| @@ -894,9 +894,9 @@ static bool cmd_write_lock(struct dm_cache_metadata *cmd) · 893 unmodified lines | |||
| 894 | 894 | ||
| 895 | static bool cmd_read_lock(struct dm_cache_metadata *cmd) | 895 | static bool cmd_read_lock(struct dm_cache_metadata *cmd) |
| 896 | { | 896 | { |
| 897 | down_write(&cmd->root_lock); | 897 | down_read(&cmd->root_lock); |
| 898 | if (cmd->fail_io) { | 898 | if (cmd->fail_io) { |
| 899 | up_write(&cmd->root_lock); | 899 | up_read(&cmd->root_lock); |
| 900 | return false; | 900 | return false; |
| 901 | } | 901 | } |
| 902 | return true; | 902 | return true; |