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- From fc2a68dea3c04061fa6f237dac63e7a8cdc7c1e4 Mon Sep 17 00:00:00 2001
- From: popcornmix <popcornmix@gmail.com>
- Date: Wed, 20 Jan 2016 17:50:09 +0000
- Subject: [PATCH] smsx95xx: Add option to disable the crimes against truesize
- fix
- It may improve iperf numbers on Pi 1, but may generate dmesg warnings and possibly cause network issues
- See issue 1248.
- ---
- drivers/net/usb/smsc95xx.c | 8 ++++++++
- 1 file changed, 8 insertions(+)
- mode change 100755 => 100644 drivers/net/usb/smsc95xx.c
- --- a/drivers/net/usb/smsc95xx.c
- +++ b/drivers/net/usb/smsc95xx.c
- @@ -75,6 +75,10 @@ static bool turbo_mode = false;
- module_param(turbo_mode, bool, 0644);
- MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
-
- +static bool truesize_mode = false;
- +module_param(truesize_mode, bool, 0644);
- +MODULE_PARM_DESC(truesize_mode, "Report larger truesize value");
- +
- static char *macaddr = ":";
- module_param(macaddr, charp, 0);
- MODULE_PARM_DESC(macaddr, "MAC address");
- @@ -1844,6 +1848,8 @@ static int smsc95xx_rx_fixup(struct usbn
- if (dev->net->features & NETIF_F_RXCSUM)
- smsc95xx_rx_csum_offload(skb);
- skb_trim(skb, skb->len - 4); /* remove fcs */
- + if (truesize_mode)
- + skb->truesize = size + sizeof(struct sk_buff);
-
- return 1;
- }
- @@ -1861,6 +1867,8 @@ static int smsc95xx_rx_fixup(struct usbn
- if (dev->net->features & NETIF_F_RXCSUM)
- smsc95xx_rx_csum_offload(ax_skb);
- skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
- + if (truesize_mode)
- + ax_skb->truesize = size + sizeof(struct sk_buff);
-
- usbnet_skb_return(dev, ax_skb);
- }
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