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authorTatyana Nikolova <Tatyana.E.Nikolova@intel.com>2012-11-03 03:17:45 +0400
committerRoland Dreier <roland@purestorage.com>2012-11-22 12:49:13 +0400
commitbff3976bef4f917554292d48ce43636f3d040182 (patch)
treeaf139ccfac997af413ef473ad273f590244b4788 /drivers/infiniband
parent3127e4ea54fc023e35adb1d9af29d49c6d582d12 (diff)
downloadlinux-bff3976bef4f917554292d48ce43636f3d040182.tar.xz
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>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/nes/nes_mgt.c11
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 */