USB: ffs-test: fix length argument of out function call

commit eb9c5836384cd2a276254df6254ed71117983626 upstream.

The out functions should only handle actual available data instead of the complete buffer.
Otherwise for example the ep0_consume function will report ghost events since it tries to decode
the complete buffer - which may contain partly invalid data.

Signed-off-by: Matthias Fend <matthias.fend@wolfvision.net>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/tools/usb/ffs-test.c b/tools/usb/ffs-test.c
index b9c7986316997b4f820ed1567a71ff911ae3d107..f17dfee1e21b2db8040427f0a747d10f4041a49c 100644 (file)
--- a/tools/usb/ffs-test.c
+++ b/tools/usb/ffs-test.c
@@ -324,7 +324,7 @@ static void *start_thread_helper(void *arg)
 
                ret = t->in(t, t->buf, t->buf_size);
                if (ret > 0) {
-                       ret = t->out(t, t->buf, t->buf_size);
+                       ret = t->out(t, t->buf, ret);
                        name = out_name;
                        op = "write";
                } else {