RDMA/ipoib: Remove can_sleep parameter from iboib_mcast_alloc

can_sleep is always 0 when iboib_mcast_alloc() is called, so remove it and
use GFP_ATOMIC instead of GFP_KERNEL.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Kamal Heib <[e-mail]>
Signed-off-by: Jason Gunthorpe <[e-mail]>

drivers/infiniband/ulp/ipoib/ipoib_multicast.c

···
 	kfree(mcast);
 }
 
-static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
-					     int can_sleep)
+static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev)
 {
 	struct ipoib_mcast *mcast;
 
-	mcast = kzalloc(sizeof(*mcast), can_sleep ? GFP_KERNEL : GFP_ATOMIC);
+	mcast = kzalloc(sizeof(*mcast), GFP_ATOMIC);
 	if (!mcast)
 		return NULL;
 
···
 	if (!priv->broadcast) {
 		struct ipoib_mcast *broadcast;
 
-		broadcast = ipoib_mcast_alloc(dev, 0);
+		broadcast = ipoib_mcast_alloc(dev);
 		if (!broadcast) {
 			ipoib_warn(priv, "failed to allocate broadcast group\n");
 			/*
···
 			ipoib_dbg_mcast(priv, "setting up send only multicast group for %pI6\n",
 					mgid);
 
-			mcast = ipoib_mcast_alloc(dev, 0);
+			mcast = ipoib_mcast_alloc(dev);
 			if (!mcast) {
 				ipoib_warn(priv, "unable to allocate memory "
 					   "for multicast structure\n");
···
 			ipoib_dbg_mcast(priv, "adding multicast entry for mgid %pI6\n",
 					mgid.raw);
 
-			nmcast = ipoib_mcast_alloc(dev, 0);
+			nmcast = ipoib_mcast_alloc(dev);
 			if (!nmcast) {
 				ipoib_warn(priv, "unable to allocate memory for multicast structure\n");
 				continue;