From b4bd8ad9bb311e8536f726f7a633620ccd358cde Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Thu, 24 May 2012 04:58:27 +0000 Subject: [PATCH] solos-pci: Fix DMA support 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 Cc: stable@kernel.org Signed-off-by: David S. Miller --- drivers/atm/solos-pci.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/atm/solos-pci.c b/drivers/atm/solos-pci.c index e8cd652d2017..98510931c815 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; -- 2.20.1