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| author | Mark Brown <broonie@linaro.org> | 2013-12-30 12:38:53 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-12-30 12:38:53 +0000 |
| commit | 34f653345018c42cedea89b7f6a4aba3783ebd7b (patch) | |
| tree | 663f490f3e16571516dbcce7a2cb2f2545f79dee /drivers/md/persistent-data/dm-array.c | |
| parent | 3b58ee13da7510115b66f71c67c9e87b47e9c4aa (diff) | |
| parent | 319e2e3f63c348a9b66db4667efa73178e18b17d (diff) | |
Merge tag 'v3.13-rc4' into regmap-core
Needed as a subsequent patch is built on some of the fixes.
Linux 3.13-rc4
Diffstat (limited to 'drivers/md/persistent-data/dm-array.c')
| -rw-r--r-- | drivers/md/persistent-data/dm-array.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/md/persistent-data/dm-array.c b/drivers/md/persistent-data/dm-array.c index af96e24ec32..1d75b1dc1e2 100644 --- a/drivers/md/persistent-data/dm-array.c +++ b/drivers/md/persistent-data/dm-array.c @@ -317,8 +317,16 @@ static int shadow_ablock(struct dm_array_info *info, dm_block_t *root, * The shadow op will often be a noop. Only insert if it really * copied data. */ - if (dm_block_location(*block) != b) + if (dm_block_location(*block) != b) { + /* + * dm_tm_shadow_block will have already decremented the old + * block, but it is still referenced by the btree. We + * increment to stop the insert decrementing it below zero + * when overwriting the old value. + */ + dm_tm_inc(info->btree_info.tm, b); r = insert_ablock(info, index, *block, root); + } return r; } |