[Xen-devel] [PATCH V4 2/7] xen-netfront: frags -> slots in xennet_get_responses

[Wei Liu <wei.liu2@xxxxxxxxxx>]

This function is in fact counting the ring slots required for responses.
Separate the concepts of ring slots and skb frags make the code clearer, as
now netfront and netback can have different MAX_SKB_FRAGS, slot and frag are
not mapped 1:1 any more.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Reviewed-by: David Vrabel <david.vrabel@xxxxxxxxxx>
---
 drivers/net/xen-netfront.c |   18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 5527663..d9097a7 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -712,7 +712,7 @@ static int xennet_get_responses(struct netfront_info *np,
        struct sk_buff *skb = xennet_get_rx_skb(np, cons);
        grant_ref_t ref = xennet_get_rx_ref(np, cons);
        int max = MAX_SKB_FRAGS + (rx->status <= RX_COPY_THRESHOLD);
-       int frags = 1;
+       int slots = 1;
        int err = 0;
        unsigned long ret;
 
@@ -756,27 +756,27 @@ next:
                if (!(rx->flags & XEN_NETRXF_more_data))
                        break;
 
-               if (cons + frags == rp) {
+               if (cons + slots == rp) {
                        if (net_ratelimit())
-                               dev_warn(dev, "Need more frags\n");
+                               dev_warn(dev, "Need more slots\n");
                        err = -ENOENT;
                        break;
                }
 
-               rx = RING_GET_RESPONSE(&np->rx, cons + frags);
-               skb = xennet_get_rx_skb(np, cons + frags);
-               ref = xennet_get_rx_ref(np, cons + frags);
-               frags++;
+               rx = RING_GET_RESPONSE(&np->rx, cons + slots);
+               skb = xennet_get_rx_skb(np, cons + slots);
+               ref = xennet_get_rx_ref(np, cons + slots);
+               slots++;
        }
 
-       if (unlikely(frags > max)) {
+       if (unlikely(slots > max)) {
                if (net_ratelimit())
                        dev_warn(dev, "Too many frags\n");
                err = -E2BIG;
        }
 
        if (unlikely(err))
-               np->rx.rsp_cons = cons + frags;
+               np->rx.rsp_cons = cons + slots;
 
        return err;
 }
-- 
1.7.10.4


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel