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IPoIB: Make sure no receives are handled when stopping device 

The current IPoIB code might process receive completions from
ipoib_drain_cq() when bringing down the interface.  This could cause
packets to be passed up the stack without the device's poll method
being called.  Avoid this by setting the status of any successful
completions to IB_WC_WR_FLUSH_ERR.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier 2007-10-09 19:59:04 -07:00
parent e54664c095
commit ce423ef50e
1 changed files with 8 additions and 0 deletions
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8
drivers/infiniband/ulp/ipoib/ipoib_ib.c
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@ -558,6 +558,14 @@ void ipoib_drain_cq(struct net_device *dev)
do {
n = ib_poll_cq(priv->cq, IPOIB_NUM_WC, priv->ibwc);
for (i = 0; i < n; ++i) {
/*
* Convert any successful completions to flush
* errors to avoid passing packets up the
* stack after bringing the device down.
*/
if (priv->ibwc[i].status == IB_WC_SUCCESS)
priv->ibwc[i].status = IB_WC_WR_FLUSH_ERR;
if (priv->ibwc[i].wr_id & IPOIB_CM_OP_SRQ)
ipoib_cm_handle_rx_wc(dev, priv->ibwc + i);
else if (priv->ibwc[i].wr_id & IPOIB_OP_RECV)