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authorKrzysztof Halasa <khc@pm.waw.pl>2009-07-14 11:01:54 +0000
committerDavid S. Miller <davem@davemloft.net>2009-07-16 18:05:25 -0700
commit303d67c288319768b19ed8dbed429fef7eb7c275 (patch)
tree18e69016f5d32d2205171cddedc065e1e4b46b65 /drivers/net/e100.c
parente36b9d16c6a6d0f59803b3ef04ff3c22c3844c10 (diff)
E100: work around the driver using streaming DMA mapping for RX descriptors.
E100 places it's RX packet descriptors inside skb->data and uses them with bidirectional streaming DMA mapping. Unfortunately it fails to transfer skb->data ownership to the device after it reads the descriptor's status, breaking on non-coherent (e.g., ARM) platforms. This have to be converted to use coherent memory for the descriptors. Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/e100.c')
-rw-r--r--drivers/net/e100.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/e100.c b/drivers/net/e100.c
index efa680f4b8d..41b648a67fe 100644
--- a/drivers/net/e100.c
+++ b/drivers/net/e100.c
@@ -1897,6 +1897,9 @@ static int e100_rx_indicate(struct nic *nic, struct rx *rx,
if (ioread8(&nic->csr->scb.status) & rus_no_res)
nic->ru_running = RU_SUSPENDED;
+ pci_dma_sync_single_for_device(nic->pdev, rx->dma_addr,
+ sizeof(struct rfd),
+ PCI_DMA_BIDIRECTIONAL);
return -ENODATA;
}