[PATCH][BUG] fs: thaw_bdev() should return EINVAL if bd_fsfreeze_count is 0

[Masayoshi MIZUMA <m.mizuma@xxxxxxxxxxxxxx>]

Hi,

thaw_bdev() should return EINVAL if bd_fsfreeze_count is 0 at entering
thaw_bdev() because it is expected that bd_fsfreeze_count is incremented
by freeze_bdev().

This bug was added by commit:4504230a71566785a05d3e6b53fa1ee071b864eb

Signed-off-by: Masayoshi MIZUMA <m.mizuma@xxxxxxxxxxxxxx>
---
 fs/block_dev.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 6dcee88..90992b3 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -331,7 +331,7 @@ out_unfrozen:
                deactivate_locked_super(sb);
 out_unlock:
        mutex_unlock(&bdev->bd_fsfreeze_mutex);
-       return 0;
+       return error;
 }
 EXPORT_SYMBOL(thaw_bdev);

--
1.6.6

Thanks,
Masayoshi

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