skbuff: clear tx zero-copy flag

This patch clears tx zero-copy flag as needed.

Signed-off-by: Shirley Ma <xma@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index a9577a2f3a43..d220119f13ab 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -677,6 +677,7 @@ struct sk_buff *skb_clone(struct sk_buff *skb, gfp_t gfp_mask)
         if (skb_shinfo(skb)->tx_flags & SKBTX_DEV_ZEROCOPY) {
                 if (skb_copy_ubufs(skb, gfp_mask))
                         return NULL;
+                skb_shinfo(skb)->tx_flags &= ~SKBTX_DEV_ZEROCOPY;
         }
 
         n = skb + 1;
@@ -801,6 +802,7 @@ struct sk_buff *pskb_copy(struct sk_buff *skb, gfp_t gfp_mask)
                                 kfree(n);
                                 goto out;
                         }
+                        skb_shinfo(skb)->tx_flags &= ~SKBTX_DEV_ZEROCOPY;
                 }
                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
                         skb_shinfo(n)->frags[i] = skb_shinfo(skb)->frags[i];
@@ -893,6 +895,7 @@ int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail,
                 if (skb_shinfo(skb)->tx_flags & SKBTX_DEV_ZEROCOPY) {
                         if (skb_copy_ubufs(skb, gfp_mask))
                                 goto nofrags;
+                        skb_shinfo(skb)->tx_flags &= ~SKBTX_DEV_ZEROCOPY;
                 }
                 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
                         get_page(skb_shinfo(skb)->frags[i].page);