Since the driver already sets the correct dma_mask, there is no reason
to bail there. In fact if you have an iommu, I think you can have a
address above 1G which will be ok for the device (if it isn't true then
the powerpc dma_alloc_coherent with iommu needs to be fixed because it
doesn't respect the the dma_mask).
Please comment or apply.
Signed-off-by: Benoit Boissinot <[email protected]>
Index: linux/drivers/net/wireless/bcm43xx/bcm43xx_dma.c
===================================================================
--- linux.orig/drivers/net/wireless/bcm43xx/bcm43xx_dma.c
+++ linux/drivers/net/wireless/bcm43xx/bcm43xx_dma.c
@@ -194,14 +194,6 @@ static int alloc_ringmemory(struct bcm43
printk(KERN_ERR PFX "DMA ringmemory allocation failed\n");
return -ENOMEM;
}
- if (ring->dmabase + BCM43xx_DMA_RINGMEMSIZE > BCM43xx_DMA_BUSADDRMAX) {
- printk(KERN_ERR PFX ">>>FATAL ERROR<<< DMA RINGMEMORY >1G "
- "(0x%08x, len: %lu)\n",
- ring->dmabase, BCM43xx_DMA_RINGMEMSIZE);
- dma_free_coherent(dev, BCM43xx_DMA_RINGMEMSIZE,
- ring->vbase, ring->dmabase);
- return -ENOMEM;
- }
assert(!(ring->dmabase & 0x000003FF));
memset(ring->vbase, 0, BCM43xx_DMA_RINGMEMSIZE);
@@ -303,14 +295,6 @@ static int setup_rx_descbuffer(struct bc
if (unlikely(!skb))
return -ENOMEM;
dmaaddr = map_descbuffer(ring, skb->data, ring->rx_buffersize, 0);
- if (unlikely(dmaaddr + ring->rx_buffersize > BCM43xx_DMA_BUSADDRMAX)) {
- unmap_descbuffer(ring, dmaaddr, ring->rx_buffersize, 0);
- dev_kfree_skb_any(skb);
- printk(KERN_ERR PFX ">>>FATAL ERROR<<< DMA RX SKB >1G "
- "(0x%08x, len: %u)\n",
- dmaaddr, ring->rx_buffersize);
- return -ENOMEM;
- }
meta->skb = skb;
meta->dmaaddr = dmaaddr;
skb->dev = ring->bcm->net_dev;
@@ -726,13 +710,6 @@ static int dma_tx_fragment(struct bcm43x
meta->skb = skb;
meta->dmaaddr = map_descbuffer(ring, skb->data, skb->len, 1);
- if (unlikely(meta->dmaaddr + skb->len > BCM43xx_DMA_BUSADDRMAX)) {
- return_slot(ring, slot);
- printk(KERN_ERR PFX ">>>FATAL ERROR<<< DMA TX SKB >1G "
- "(0x%08x, len: %u)\n",
- meta->dmaaddr, skb->len);
- return -ENOMEM;
- }
desc_addr = (u32)(meta->dmaaddr + ring->memoffset);
desc_ctl = BCM43xx_DMADTOR_FRAMESTART | BCM43xx_DMADTOR_FRAMEEND;
-
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