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