Merge branch 'net-zerocopy-fixes'

Willem de Bruijn says:

====================
net: zerocopy fixes

Fix two issues introduced in the msg_zerocopy patchset.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/skbuff.h

@@ -1273,8 +1273,13 @@ static inline void skb_zcopy_clear(struct sk_buff *skb, bool zerocopy)
 	struct ubuf_info *uarg = skb_zcopy(skb);
 
 	if (uarg) {
-		uarg->zerocopy = uarg->zerocopy && zerocopy;
-		sock_zerocopy_put(uarg);
+		if (uarg->callback == sock_zerocopy_callback) {
+			uarg->zerocopy = uarg->zerocopy && zerocopy;
+			sock_zerocopy_put(uarg);
+		} else {
+			uarg->callback(uarg, zerocopy);
+		}
+
 		skb_shinfo(skb)->tx_flags &= ~SKBTX_ZEROCOPY_FRAG;
 	}
 }

net/core/skbuff.c

@@ -1044,6 +1044,8 @@ void sock_zerocopy_callback(struct ubuf_info *uarg, bool success)
 	u32 lo, hi;
 	u16 len;
 
+	mm_unaccount_pinned_pages(&uarg->mmp);
+
 	/* if !len, there was only 1 call, and it was aborted
 	 * so do not queue a completion notification
 	 */
@@ -1084,8 +1086,6 @@ EXPORT_SYMBOL_GPL(sock_zerocopy_callback);
 void sock_zerocopy_put(struct ubuf_info *uarg)
 {
 	if (uarg && atomic_dec_and_test(&uarg->refcnt)) {
-		mm_unaccount_pinned_pages(&uarg->mmp);
-
 		if (uarg->callback)
 			uarg->callback(uarg, uarg->zerocopy);
 		else