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authorYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>2016-08-22 11:48:28 +0300
committerFelipe Balbi <felipe.balbi@linux.intel.com>2016-08-31 10:06:04 +0300
commitee5acabf5805612c72084276e0c215367a042d71 (patch)
tree8c0d38b7b819511d65814b8b50cd517bcaa40396 /drivers/usb/renesas_usbhs
parentc4824f11fe07835c63209fb035f03f8f82e12827 (diff)
downloadlinux-ee5acabf5805612c72084276e0c215367a042d71.tar.xz
usb: renesas_usbhs: set quirk_avoids_skb_reserve if USB-DMAC is used
This patch sets the quirk_avoids_skb_reserve flag to improve performance of a network gadget driver (e.g. f_ncm.c) if USB-DMAC is used. For example (on r8a7795 board + f_ncm.c + iperf udp mode / receiving): - without this patch: 90.3 Mbits/sec - with this patch: 273 Mbits/sec Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/renesas_usbhs')
-rw-r--r--drivers/usb/renesas_usbhs/mod_gadget.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
index 8e326ac00c9f..5732998de92a 100644
--- a/drivers/usb/renesas_usbhs/mod_gadget.c
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -1102,6 +1102,8 @@ int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
gpriv->gadget.name = "renesas_usbhs_udc";
gpriv->gadget.ops = &usbhsg_gadget_ops;
gpriv->gadget.max_speed = USB_SPEED_HIGH;
+ gpriv->gadget.quirk_avoids_skb_reserve = usbhs_get_dparam(priv,
+ has_usb_dmac);
INIT_LIST_HEAD(&gpriv->gadget.ep_list);