From: Malcolm Priestley <tvboxspy@gmail.com>
Date: Sun, 21 Dec 2014 12:56:34 +0000 (+0000)
Subject: staging: vt6655: vnt_tx_packet Fix corrupted tx packets.
X-Git-Tag: fixes-v4.0-rc1~285^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5745290af06a621aaddfd636bab4f08432d0492;p=pandora-kernel.git

staging: vt6655: vnt_tx_packet Fix corrupted tx packets.

Move PSTxDesc->m_td1TD1 to inside spin locks.

if m_td1TD1.byTCR has TCR_EDP and TCR_STP are set, the interrupt handler will
try and complete the buffer before it is completed. Usually on the tail
of a burst of tx packets.

This results in a partially completed packet being transmitted or worse
sitll dead lock when skb is freed by the interrupt handler.

Set head_td->m_td1TD1.byTCR to 0 in first lock of vnt_tx_packet to stop
interrupt handler completing the buffer. Move Set TSR1 & ReqCount in
s_cbFillTxBufHead to the second lock.

cbReqCount is carried to the second lock in pTDInfo->dwReqCount without
the padding removed.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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