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Message-ID: <1355407879-11784-1-git-send-email-armando.visconti@st.com> Date: Thu, 13 Dec 2012 15:11:19 +0100 From: Armando Visconti <armando.visconti@...com> To: <balbi@...com> Cc: <gregkh@...uxfoundation.org>, <pratyush.anand@...com>, <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <spear-devel@...t.st.com> Subject: [PATCH] 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 inited 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@...com> --- drivers/usb/gadget/f_sourcesink.c | 3 +-- 1 files changed, 1 insertions(+), 2 deletions(-) diff --git a/drivers/usb/gadget/f_sourcesink.c b/drivers/usb/gadget/f_sourcesink.c index 3c126fd..534cf8c 100644 --- a/drivers/usb/gadget/f_sourcesink.c +++ b/drivers/usb/gadget/f_sourcesink.c @@ -536,8 +536,7 @@ 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 */ -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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