[PATCH V2] 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.visco...@st.com Reviewed-by: Sebastian Andrzej Siewior bige...@linutronix.de --- This is patch V2, after Sbatian's review. Patch is very simple, but my assumption needs to be cross-verified. This patch has been quickly tested using a DWC3 controller gadget device. Felipe, if you can quicly take a look at it.. Armando 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-usb in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH] usb: gadget zero: avoid unnecessary reinit of data in f_sourcesink
On 12/17/2012 04:45 PM, Sebastian Andrzej Siewior wrote: On Thu, Dec 13, 2012 at 03:11:19PM +0100, Armando Visconti wrote: 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. Besides that the patch looks fine :) Do you mean that 'inited' should be changed with 'initialized'? Oh ... my poor english... :( Rgds, Arm -- To unsubscribe from this list: send the line unsubscribe linux-usb in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[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.visco...@st.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-usb in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
