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(parent: c4824f1) | patch
usb: renesas_usbhs: set quirk_avoids_skb_reserve if USB-DMAC is used
authorYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Mon, 22 Aug 2016 08:48:28 +0000 (17:48 +0900)
committerFelipe Balbi <felipe.balbi@linux.intel.com>
Wed, 31 Aug 2016 07:06:04 +0000 (10:06 +0300)
commitee5acabf5805612c72084276e0c215367a042d71
tree8c0d38b7b819511d65814b8b50cd517bcaa40396tree | snapshot
parentc4824f11fe07835c63209fb035f03f8f82e12827commit | diff
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>
drivers/usb/renesas_usbhs/mod_gadget.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git