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ixgb: fix TX hangs under heavy load

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A merge error occurred where we merged the wrong block here
in version 1.0.120. The right condition for frags is slightly
different then for the skb, so account for the difference properly
and trim the TSO based size right.

Originally part of a fix reported by IBM to fix TSO hangs on
pSeries hardware.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Auke Kok 2007-10-30 11:21:50 -07:00 committed by Jeff Garzik
parent 6e4ca80d27
commit 19abe86d60
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ixgb/ixgb_main.c
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@ -1321,8 +1321,8 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
/* Workaround for premature desc write-backs
* in TSO mode. Append 4-byte sentinel desc */
if (unlikely(mss && !nr_frags && size == len
&& size > 8))
if (unlikely(mss && (f == (nr_frags - 1))
&& size == len && size > 8))
size -= 4;
buffer_info->length = size;