[ATM]: [he] when transmit fails, unmap the dma regions

Signed-off-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/atm/he.c b/drivers/atm/he.c
index d369130f4235..dd96123a2b7f 100644
--- a/drivers/atm/he.c
+++ b/drivers/atm/he.c
@@ -2282,6 +2282,8 @@ __enqueue_tpd(struct he_dev *he_dev, struct he_tpd *tpd, unsigned cid)
                                 TPDRQ_MASK(he_readl(he_dev, TPDRQ_B_H)));
 
                 if (new_tail == he_dev->tpdrq_head) {
+                        int slot;
+
                         hprintk("tpdrq full (cid 0x%x)\n", cid);
                         /*
                          * FIXME
@@ -2289,6 +2291,13 @@ __enqueue_tpd(struct he_dev *he_dev, struct he_tpd *tpd, unsigned cid)
                          * after service_tbrq, service the backlog
                          * for now, we just drop the pdu
                          */
+                        for (slot = 0; slot < TPD_MAXIOV; ++slot) {
+                                if (tpd->iovec[slot].addr)
+                                        pci_unmap_single(he_dev->pci_dev,
+                                                tpd->iovec[slot].addr,
+                                                tpd->iovec[slot].len & TPD_LEN_MASK,
+                                                                PCI_DMA_TODEVICE);
+                        }
                         if (tpd->skb) {
                                 if (tpd->vcc->pop)
                                         tpd->vcc->pop(tpd->vcc, tpd->skb);