usb: gadget zero: avoid unnecessary reinit of data in f_sourcesink

In the IN case, since the USB request is allocated only when
the source/sink function is started and never freed, the USB ept
buffer needs to be initialized only at the beginning. This change
results into a more performant g_zero module, especially when
'pattern=1' is selected.

Signed-off-by: Armando Visconti <armando.visconti@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/f_sourcesink.c b/drivers/usb/gadget/f_sourcesink.c
index 102d49b..de60886 100644 (file)
--- a/drivers/usb/gadget/f_sourcesink.c
+++ b/drivers/usb/gadget/f_sourcesink.c
@@ -531,8 +531,7 @@ static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
                        check_read_data(ss, req);
                        if (pattern != 2)
                                memset(req->buf, 0x55, req->length);
-               } else
-                       reinit_write_data(ep, req);
+               }
                break;
 
        /* this endpoint is normally active while we're configured */