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| author | Peng Tao <tao.peng@primarydata.com> | 2015-01-20 00:44:29 +0100 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-01-21 23:10:08 +0100 |
| commit | ee8a1a8b160a87dc3a9c81a86796aa4db85ea815 (patch) | |
| tree | 2e79c30b8263d64614e392708d1cadee09014638 /fs/select.c | |
| parent | Linux 3.19-rc5 (diff) | |
| download | linux-ee8a1a8b160a87dc3a9c81a86796aa4db85ea815.tar.xz linux-ee8a1a8b160a87dc3a9c81a86796aa4db85ea815.zip | |
nfs: fix dio deadlock when O_DIRECT flag is flipped
We only support swap file calling nfs_direct_IO. However, application
might be able to get to nfs_direct_IO if it toggles O_DIRECT flag
during IO and it can deadlock because we grab inode->i_mutex in
nfs_file_direct_write(). So return 0 for such case. Then the generic
layer will fall back to buffer IO.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/select.c')
0 files changed, 0 insertions, 0 deletions