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authorDavid Woodhouse <dwmw2@infradead.org>2012-05-24 04:58:27 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-06-10 00:32:58 +0900
commit65ec0e1ca3d1ff89f36db4cd19441bf001fb7d8a (patch)
tree0f19c54b2ddce822a8a13f3269e04611fc6da825
parentb5035120fc0b3df71a8b58f086ec32ba5a5c1c55 (diff)
solos-pci: Fix DMA support
commit b4bd8ad9bb311e8536f726f7a633620ccd358cde upstream. DMA support has finally made its way to the top of the TODO list, having realised that a Geode using MMIO can't keep up with two ADSL2+ lines each running at 21Mb/s. This patch fixes a couple of bugs in the DMA support in the driver, so once the corresponding FPGA update is complete and tested everything should work properly. We weren't storing the currently-transmitting skb, so we were never unmapping it and never freeing/popping it when the TX was done. And the addition of pci_set_master() is fairly self-explanatory. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/atm/solos-pci.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/atm/solos-pci.c b/drivers/atm/solos-pci.c
index 5d1d07645132..d4525928fb7f 100644
--- a/drivers/atm/solos-pci.c
+++ b/drivers/atm/solos-pci.c
@@ -984,6 +984,7 @@ static uint32_t fpga_tx(struct solos_card *card)
} else if (skb && card->using_dma) {
SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
skb->len, PCI_DMA_TODEVICE);
+ card->tx_skb[port] = skb;
iowrite32(SKB_CB(skb)->dma_addr,
card->config_regs + TX_DMA_ADDR(port));
}
@@ -1152,7 +1153,8 @@ static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
db_fpga_upgrade = db_firmware_upgrade = 0;
}
- if (card->fpga_version >= DMA_SUPPORTED){
+ if (card->fpga_version >= DMA_SUPPORTED) {
+ pci_set_master(dev);
card->using_dma = 1;
} else {
card->using_dma = 0;