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| author | Pavel Shilovsky <pshilovsky@samba.org> | 2014-06-27 10:33:11 +0400 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2014-08-02 01:23:01 -0500 |
| commit | 038bc961c31b070269ecd07349a7ee2e839d4fec (patch) | |
| tree | 813bc174930417fc3c44fbd11c9cb3d68bd27e2f /fs/cifs | |
| parent | cc87c47d9d7ac25554aa81cd8ded56e75f79c198 (diff) | |
| download | blackbird-op-linux-038bc961c31b070269ecd07349a7ee2e839d4fec.tar.gz blackbird-op-linux-038bc961c31b070269ecd07349a7ee2e839d4fec.zip | |
CIFS: Fix async reading on reconnects
If we get into read_into_pages() from cifs_readv_receive() and then
loose a network, we issue cifs_reconnect that moves all mids to
a private list and issue their callbacks. The callback of the async
read request sets a mid to retry, frees it and wakes up a process
that waits on the rdata completion.
After the connection is established we return from read_into_pages()
with a short read, use the mid that was freed before and try to read
the remaining data from the a newly created socket. Both actions are
not what we want to do. In reconnect cases (-EAGAIN) we should not
mask off the error with a short read but should return the error
code instead.
Acked-by: Jeff Layton <jlayton@samba.org>
Cc: stable@vger.kernel.org
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/file.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index e90a1e9aa627..6b6df30cfd89 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -2823,7 +2823,7 @@ cifs_uncached_read_into_pages(struct TCP_Server_Info *server, total_read += result; } - return total_read > 0 ? total_read : result; + return total_read > 0 && result != -EAGAIN ? total_read : result; } ssize_t cifs_user_readv(struct kiocb *iocb, struct iov_iter *to) @@ -3231,7 +3231,7 @@ cifs_readpages_read_into_pages(struct TCP_Server_Info *server, total_read += result; } - return total_read > 0 ? total_read : result; + return total_read > 0 && result != -EAGAIN ? total_read : result; } static int cifs_readpages(struct file *file, struct address_space *mapping, |
