net/9p: set error to EREMOTEIO if trans->write returns zero

If trans->write returns 0, p9_write_work goes through the error path, but
sets the error code to zero.

This patch sets the error code to EREMOTEIO if trans->write returns zero
value.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>

diff --git a/net/9p/mux.c b/net/9p/mux.c
index c3aa87b..acb0388 100644 (file)
--- a/net/9p/mux.c
+++ b/net/9p/mux.c
@@ -505,8 +505,12 @@ again:
                return;
        }
 
-       if (err <= 0)
+       if (err < 0)
+               goto error;
+       else if (err == 0) {
+               err = -EREMOTEIO;
                goto error;
+       }
 
        m->wpos += err;
        if (m->wpos == m->wsize)