cxgb3: fix premature page unmap

unmap Rx page only when guaranteed that this page won't be
used anymore to allocate rx page chunks.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/cxgb3/sge.c b/drivers/net/cxgb3/sge.c
index f866128..6366061 100644 (file)
--- a/drivers/net/cxgb3/sge.c
+++ b/drivers/net/cxgb3/sge.c
@@ -879,7 +879,7 @@ recycle:
        pci_dma_sync_single_for_cpu(adap->pdev, dma_addr, len,
                                    PCI_DMA_FROMDEVICE);
        (*sd->pg_chunk.p_cnt)--;
        pci_dma_sync_single_for_cpu(adap->pdev, dma_addr, len,
                                    PCI_DMA_FROMDEVICE);
        (*sd->pg_chunk.p_cnt)--;

-       if (!*sd->pg_chunk.p_cnt)
+       if (!*sd->pg_chunk.p_cnt && sd->pg_chunk.page != fl->pg_chunk.page)

                pci_unmap_page(adap->pdev,
                               sd->pg_chunk.mapping,
                               fl->alloc_size,
                pci_unmap_page(adap->pdev,
                               sd->pg_chunk.mapping,
                               fl->alloc_size,


@@ -2088,7 +2088,7 @@ static void lro_add_page(struct adapter *adap, struct sge_qset *qs,
                                    PCI_DMA_FROMDEVICE);
 
        (*sd->pg_chunk.p_cnt)--;
                                    PCI_DMA_FROMDEVICE);
 
        (*sd->pg_chunk.p_cnt)--;

-       if (!*sd->pg_chunk.p_cnt)
+       if (!*sd->pg_chunk.p_cnt && sd->pg_chunk.page != fl->pg_chunk.page)

                pci_unmap_page(adap->pdev,
                               sd->pg_chunk.mapping,
                               fl->alloc_size,
                pci_unmap_page(adap->pdev,
                               sd->pg_chunk.mapping,
                               fl->alloc_size,