[PATCH 001 of 4] knfsd: Fix return value for writes to some files in 'nfsd' filesystem.

[NeilBrown <neilb@suse.de>]

Most files in the 'nfsd' filesystem are transactional.
When you write, a reply is generated that can be read back
only on the same 'file'.
If the reply has zero length, the 'write' will incorrectly 
return a value of '0' instead of the length that was
written.  This causes 'rpc.nfsd' to give an annoying warning.

This patch fixes the test.

Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
 ./fs/nfsd/nfsctl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff .prev/fs/nfsd/nfsctl.c ./fs/nfsd/nfsctl.c
--- .prev/fs/nfsd/nfsctl.c	2007-02-12 16:39:20.000000000 +1100
+++ ./fs/nfsd/nfsctl.c	2007-02-12 16:39:33.000000000 +1100
@@ -123,7 +123,7 @@ static ssize_t nfsctl_transaction_write(
 		return PTR_ERR(data);
 
 	rv =  write_op[ino](file, data, size);
-	if (rv>0) {
+	if (rv >= 0) {
 		simple_transaction_set(file, rv);
 		rv = size;
 	}
-
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