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Date: Fri, 24 May 96 18:15:46 cdt
From: mevans@candle.com (Michael T. Evans)
Reply-To: mevans@candle.com (Michael T. Evans)
To: bugs@freebsd.org
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Subject: 3c509 transmit hang
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Hi,

	Discovered a defect in pci/if_vx.c leading to a permanent hang
when transmitting large quantities of data (such as ftp).  The
flag requesting a transmit-complete interrupt is not being set
in the output packet prefix.  According to the 3com 3c5x9
technical reference, bit 15 of the length word is the "request
transmit-complete flag".  Adding the bit to the outw sending the
length prefix corrects the hang condition.

	I'd send in a diff, but I've migrated this driver backward to
2.1, so it would regress other changes in current.  Please let
me know if there's a more suitable way to provide this
information.

Regards, Mike Evans