diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2016-08-22 10:48:28 +0200 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-08-31 09:06:04 +0200 |
| commit | ee5acabf5805612c72084276e0c215367a042d71 (patch) | |
| tree | 8c0d38b7b819511d65814b8b50cd517bcaa40396 /drivers/usb/renesas_usbhs | |
| parent | usb: gadget: f_ncm: add support for no_skb_reserve (diff) | |
| download | linux-ee5acabf5805612c72084276e0c215367a042d71.tar.xz linux-ee5acabf5805612c72084276e0c215367a042d71.zip | |
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.c | 2 |
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); |