This is a note to let you know that I've just added the patch titled
solos-pci: Fix DMA support
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
solos-pci-fix-dma-support.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From b4bd8ad9bb311e8536f726f7a633620ccd358cde Mon Sep 17 00:00:00 2001
From: David Woodhouse <dw...@infradead.org>
Date: Thu, 24 May 2012 04:58:27 +0000
Subject: solos-pci: Fix DMA support
From: David Woodhouse <dw...@infradead.org>
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.woodho...@intel.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/atm/solos-pci.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/atm/solos-pci.c
+++ b/drivers/atm/solos-pci.c
@@ -984,6 +984,7 @@ static uint32_t fpga_tx(struct solos_car
} 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 *de
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;
Patches currently in stable-queue which might be from dw...@infradead.org are
queue-3.4/solos-pci-fix-dma-support.patch
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