tipc: use consistent GFP flags

Some functions, like tipc_crypto_start use inconsisten GFP flags
when allocating memory. The mentioned function use GFP_ATOMIC to
to alloc a crypto instance, and then calls alloc_ordered_workqueue()
which allocates memory with GFP_KERNEL. tipc_aead_init() function
even uses GFP_KERNEL and GFP_ATOMIC interchangeably.
No doc comment specifies what context a function is designed to
work in, but the flags should at least be consistent within a function.

Cc: Jon Maloy <jmaloy@redhat.com>
Cc: Ying Xue <ying.xue@windriver.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
Cc: tipc-discussion@lists.sourceforge.net
Cc: linux-kernel@vger.kernel.org

Signed-off-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: tstruk

net/tipc/crypto.c

@@ -524,7 +524,7 @@ static int tipc_aead_init(struct tipc_aead **aead, struct tipc_aead_key *ukey,
 		return -EEXIST;
 
 	/* Allocate a new AEAD */
-	tmp = kzalloc(sizeof(*tmp), GFP_ATOMIC);
+	tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
 	if (unlikely(!tmp))
 		return -ENOMEM;
 
@@ -1470,7 +1470,7 @@ int tipc_crypto_start(struct tipc_crypto **crypto, struct net *net,
 		return -EEXIST;
 
 	/* Allocate crypto */
-	c = kzalloc(sizeof(*c), GFP_ATOMIC);
+	c = kzalloc(sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return -ENOMEM;
 
@@ -1484,7 +1484,7 @@ int tipc_crypto_start(struct tipc_crypto **crypto, struct net *net,
 	}
 
 	/* Allocate statistic structure */
-	c->stats = alloc_percpu_gfp(struct tipc_crypto_stats, GFP_ATOMIC);
+	c->stats = alloc_percpu(struct tipc_crypto_stats);
 	if (!c->stats) {
 		if (c->wq)
 			destroy_workqueue(c->wq);
@@ -2457,7 +2457,7 @@ static void tipc_crypto_work_tx(struct work_struct *work)
 	}
 
 	/* Lets duplicate it first */
-	skey = kmemdup(aead->key, tipc_aead_key_size(aead->key), GFP_ATOMIC);
+	skey = kmemdup(aead->key, tipc_aead_key_size(aead->key), GFP_KERNEL);
 	rcu_read_unlock();
 
 	/* Now, generate new key, initiate & distribute it */