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

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>
Cc: stable <stable@vger.kernel.org>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/tools/usb/ffs-test.c b/tools/usb/ffs-test.c
index 4b107b5e623fff802df9e49065273e90661c83fe..8674b9ec14f69882f2e64e689581284bdfeced4b 100644 (file)
--- a/tools/usb/ffs-test.c
+++ b/tools/usb/ffs-test.c
@@ -297,7 +297,7 @@ 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 {