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-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_ib.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_ib.c b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
index dc6d241b9406..be11d5d5b8c1 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_ib.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_ib.c
@@ -1161,8 +1161,17 @@ static void __ipoib_ib_dev_flush(struct ipoib_dev_priv *priv,
}
if (level == IPOIB_FLUSH_LIGHT) {
+ int oper_up;
ipoib_mark_paths_invalid(dev);
+ /* Set IPoIB operation as down to prevent races between:
+ * the flush flow which leaves MCG and on the fly joins
+ * which can happen during that time. mcast restart task
+ * should deal with join requests we missed.
+ */
+ oper_up = test_and_clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
ipoib_mcast_dev_flush(dev);
+ if (oper_up)
+ set_bit(IPOIB_FLAG_OPER_UP, &priv->flags);
ipoib_flush_ah(dev);
}