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authorWei Liu <wei.liu2@citrix.com>2013-03-25 01:08:19 +0000
committerDavid S. Miller <davem@davemloft.net>2013-03-25 12:19:26 -0400
commit7158ff6d0c6aa3724fb51c6c11143d31e166eb1f (patch)
treee10b0210c7dc85adb2b05c6a617405131d89610b /drivers/net/xen-netfront.c
parente2d617c0ccf658a55552955f07018ecfa0135210 (diff)
downloadop-kernel-dev-7158ff6d0c6aa3724fb51c6c11143d31e166eb1f.zip
op-kernel-dev-7158ff6d0c6aa3724fb51c6c11143d31e166eb1f.tar.gz
xen-netfront: frags -> slots in xennet_get_responses
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@citrix.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netfront.c')
-rw-r--r--drivers/net/xen-netfront.c18
1 files 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;
}
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