From: Roland Dreier Date: Wed, 10 Oct 2007 02:59:04 +0000 (-0700) Subject: IPoIB: Make sure no receives are handled when stopping device X-Git-Tag: upstream/snapshot3+hdmi~30757^2~85 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ce423ef50ee1b6b7db63c748034423aa0afce224;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git 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 --- diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c index 1094488..5a70e28 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c @@ -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)