From 7158ff6d0c6aa3724fb51c6c11143d31e166eb1f Mon Sep 17 00:00:00 2001 From: Wei Liu Date: Mon, 25 Mar 2013 01:08:19 +0000 Subject: [PATCH] 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 Reviewed-by: David Vrabel Signed-off-by: David S. Miller --- 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 55276635e69b..d9097a786962 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 @@ static int xennet_get_responses(struct netfront_info *np, 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; } -- GitLab