From 0b746e08cd7fb35d80c184f8e3f4656aa1f1ae11 Mon Sep 17 00:00:00 2001
From: Shannon Nelson <shannon.nelson@intel.com>
Date: Tue, 18 May 2010 16:00:03 +0000
Subject: [PATCH] ixgbe: fix header len when unsplit packet overflows to data
buffer
When in packet split mode, packet type is not recognized, and the packet is
larger than the header size, the 82599 overflows the packet into the data
area, but doesn't set the HDR_LEN field. We can safely assume the length
is the current header size. This fixes an obscure corner case that can be
triggered by non-ip packet headers or (more likely) by disabling the L2
packet recognition.
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ixgbe/ixgbe_main.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 926ad8c2f2c7..a9e091cb5499 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -1201,9 +1201,10 @@ static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
IXGBE_RXDADV_HDRBUFLEN_SHIFT;
- if (len > IXGBE_RX_HDR_SIZE)
- len = IXGBE_RX_HDR_SIZE;
upper_len = le16_to_cpu(rx_desc->wb.upper.length);
+ if ((len > IXGBE_RX_HDR_SIZE) ||
+ (upper_len && !(hdr_info & IXGBE_RXDADV_SPH)))
+ len = IXGBE_RX_HDR_SIZE;
} else {
len = le16_to_cpu(rx_desc->wb.upper.length);
}
--
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