From: Divy Le Ray <divy@chelsio.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
swise@opengridcomputing.com
Subject: [PATCH 2.6.32] cxgb3: fix premature page unmap
Date: Tue, 17 Nov 2009 18:38:28 -0800 [thread overview]
Message-ID: <20091118023828.16411.57681.stgit@localhost.localdomain> (raw)
From: Divy Le Ray <divy@chelsio.com>
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>
---
drivers/net/cxgb3/sge.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/cxgb3/sge.c b/drivers/net/cxgb3/sge.c
index f866128..6366061 100644
--- 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)--;
- 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,
@@ -2088,7 +2088,7 @@ static void lro_add_page(struct adapter *adap, struct sge_qset *qs,
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,
next reply other threads:[~2009-11-18 2:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-18 2:38 Divy Le Ray [this message]
2009-11-18 13:11 ` [PATCH 2.6.32] cxgb3: fix premature page unmap David Miller
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