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[PATCH] sk98lin: not doing high dma properly 

Sk98lin 64bit memory handling is wrong. It doesn't set the
highdma flag; i.e. the kernel always does bounce buffers.
It doesn't fallback to 32 bit mask if it can't get 64 bit mask.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Stephen Hemminger 2006-01-06 16:57:40 -08:00 committed by Jeff Garzik
parent 17fa6e2f11
commit bce7c95e4d
1 changed files with 24 additions and 4 deletions
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28
drivers/net/sk98lin/skge.c
View File

@ -4775,16 +4775,30 @@ static int __devinit skge_probe_one(struct pci_dev *pdev,
struct net_device *dev = NULL;
static int boards_found = 0;
int error = -ENODEV;
int using_dac = 0;
char DeviceStr[80];
if (pci_enable_device(pdev))
goto out;
/* Configure DMA attributes. */
if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
pci_set_dma_mask(pdev, DMA_32BIT_MASK))
goto out_disable_device;
if (sizeof(dma_addr_t) > sizeof(u32) &&
!(error = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
using_dac = 1;
error = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
if (error < 0) {
printk(KERN_ERR "sk98lin %s unable to obtain 64 bit DMA "
"for consistent allocations\n", pci_name(pdev));
goto out_disable_device;
}
} else {
error = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
if (error) {
printk(KERN_ERR "sk98lin %s no usable DMA configuration\n",
pci_name(pdev));
goto out_disable_device;
}
}
if ((dev = alloc_etherdev(sizeof(DEV_NET))) == NULL) {
printk(KERN_ERR "Unable to allocate etherdev "
@ -4843,6 +4857,9 @@ static int __devinit skge_probe_one(struct pci_dev *pdev,
#endif
}
if (using_dac)
dev->features |= NETIF_F_HIGHDMA;
pAC->Index = boards_found++;
if (SkGeBoardInit(dev, pAC))
@ -4919,6 +4936,9 @@ static int __devinit skge_probe_one(struct pci_dev *pdev,
#endif
}
if (using_dac)
dev->features |= NETIF_F_HIGHDMA;
if (register_netdev(dev)) {
printk(KERN_ERR "sk98lin: Could not register device for seconf port.\n");
free_netdev(dev);