diff options
| author | Tatyana Nikolova <Tatyana.E.Nikolova@intel.com> | 2012-11-02 23:17:45 +0000 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2012-11-22 00:49:13 -0800 |
| commit | bff3976bef4f917554292d48ce43636f3d040182 (patch) | |
| tree | af139ccfac997af413ef473ad273f590244b4788 | |
| parent | 3127e4ea54fc023e35adb1d9af29d49c6d582d12 (diff) | |
RDMA/nes: Fix for unlinking skbs from empty list
Signed-off-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
| -rw-r--r-- | drivers/infiniband/hw/nes/nes_mgt.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/nes/nes_mgt.c b/drivers/infiniband/hw/nes/nes_mgt.c index 8cf74fd0c44f..1f5d69e7793a 100644 --- a/drivers/infiniband/hw/nes/nes_mgt.c +++ b/drivers/infiniband/hw/nes/nes_mgt.c @@ -210,6 +210,9 @@ static struct sk_buff *nes_get_next_skb(struct nes_device *nesdev, struct nes_qp } while (1) { + if (skb_queue_empty(&nesqp->pau_list)) + goto out; + seq = nes_get_seq(skb, ack, wnd, fin_rcvd, rst_rcvd); if (seq == nextseq) { if (skb->len || processacks) @@ -218,14 +221,13 @@ static struct sk_buff *nes_get_next_skb(struct nes_device *nesdev, struct nes_qp goto out; } - if (skb->next == (struct sk_buff *)&nesqp->pau_list) - goto out; - old_skb = skb; skb = skb->next; skb_unlink(old_skb, &nesqp->pau_list); nes_mgt_free_skb(nesdev, old_skb, PCI_DMA_TODEVICE); nes_rem_ref_cm_node(nesqp->cm_node); + if (skb == (struct sk_buff *)&nesqp->pau_list) + goto out; } return skb; @@ -384,7 +386,8 @@ static int get_fpdu_info(struct nes_device *nesdev, struct nes_qp *nesqp, if (frags[i].skb->len == 0) { /* Pull skb off the list - it will be freed in the callback */ spin_lock_irqsave(&nesqp->pau_lock, flags); - skb_unlink(frags[i].skb, &nesqp->pau_list); + if (!skb_queue_empty(&nesqp->pau_list)) + skb_unlink(frags[i].skb, &nesqp->pau_list); spin_unlock_irqrestore(&nesqp->pau_lock, flags); } else { /* Last skb still has data so update the seq */ |