diff options
| author |   Ming Lei <ming.lei@canonical.com> | 2013-08-08 21:48:24 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-12 12:09:23 -0700 |
| commit | 638c5115a794981441246fa8fa5d95c1875af5ba (patch) | |
| tree | 43c74854c39e728fb80b82707f80b0f499598d7d /include/linux/usb | |
| parent | USB: XHCI: mark no_sg_constraint (diff) | |
| download | linux-dev-638c5115a794981441246fa8fa5d95c1875af5ba.tar.xz linux-dev-638c5115a794981441246fa8fa5d95c1875af5ba.zip | |
USBNET: support DMA SG
This patch introduces support of DMA SG if the USB host controller
which usbnet device is attached to is capable of building packet from
discontinuous buffers.
The patch supports passing the skb fragment buffers to usb stack directly
via urb->sg.
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: Grant Grundler <grundler@google.com>
Cc: Freddy Xin <freddy@asix.com.tw>
Cc: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/usb')
| -rw-r--r-- | include/linux/usb/usbnet.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h index f18d64129f99..2b47e6364e36 100644 --- a/include/linux/usb/usbnet.h +++ b/include/linux/usb/usbnet.h @@ -34,6 +34,7 @@ struct usbnet { struct mutex phy_mutex; unsigned char suspend_count; unsigned char pkt_cnt, pkt_err; + unsigned can_dma_sg:1; /* i/o info: pipes etc */ unsigned in, out; |