diff options
Diffstat (limited to 'drivers/net/usb/cdc_ncm.c')
| -rw-r--r-- | drivers/net/usb/cdc_ncm.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c index 5aa3e60851d0..42c86200f076 100644 --- a/drivers/net/usb/cdc_ncm.c +++ b/drivers/net/usb/cdc_ncm.c @@ -800,8 +800,12 @@ cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign) * would be more efficient for USB HS mobile device with DMA * engine to receive a full size NTB, than canceling DMA * transfer and receiving a short packet. + * + * This optimization support is pointless if we end up sending + * a ZLP after full sized NTBs. */ - if (skb_out->len > CDC_NCM_MIN_TX_PKT) + if (!(dev->driver_info->flags & FLAG_SEND_ZLP) && + skb_out->len > CDC_NCM_MIN_TX_PKT) memset(skb_put(skb_out, ctx->tx_max - skb_out->len), 0, ctx->tx_max - skb_out->len); else if ((skb_out->len % dev->maxpacket) == 0) |