net: use release_pages() in zerocopy_sg_from_iovec()

To reduce the duplicated codes.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/datagram.c b/net/core/datagram.c
index a8a795c..badcd93 100644 (file)
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -48,6 +48,7 @@
 #include <linux/highmem.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
+#include <linux/pagemap.h>
 
 #include <net/protocol.h>
 #include <linux/skbuff.h>
@@ -638,10 +639,7 @@ int zerocopy_sg_from_iovec(struct sk_buff *skb, const struct iovec *from,
                        return -EMSGSIZE;
                num_pages = get_user_pages_fast(base, size, 0, &page[i]);
                if (num_pages != size) {
-                       int j;
-
-                       for (j = 0; j < num_pages; j++)
-                               put_page(page[i + j]);
+                       release_pages(&page[i], num_pages, 0);
                        return -EFAULT;
                }
                truesize = size * PAGE_SIZE;