> ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id
> *ent)
> {
> char buf[80];
> + const uint64_t mask_39bit = 0x7FFFFFFFFFULL;
> struct ahd_softc *ahd;
> ahd_dev_softc_t pci;
> struct ahd_pci_identity *entry;
> char *name;
> int error;
> + struct device *dev = &pdev->dev;
>
> pci = pdev;
> entry = ahd_find_pci_device(pci);
> @@ -161,20 +163,17 @@ ahd_linux_pci_dev_probe(struct pci_dev *
> pci_set_master(pdev);
>
> if (sizeof(dma_addr_t) > 4) {
> - uint64_t memsize;
> - const uint64_t mask_39bit = 0x7FFFFFFFFFULL;
> -
> - memsize = ahd_linux_get_memsize();
> -
> - if (memsize >= 0x8000000000ULL
> - && pci_set_dma_mask(pdev, DMA_64BIT_MASK) == 0) {
> + if (dma_set_mask(dev, DMA_64BIT_MASK)
> + && dma_get_required_mask(dev) > mask_39bit)
> ahd->flags |= AHD_64BIT_ADDRESSING;
> - } else if (memsize > 0x80000000
> - && pci_set_dma_mask(pdev, mask_39bit) == 0) {
> + else if (dma_set_mask(dev, mask_39bit) == 0
> + && dma_get_required_mask(dev) > DMA_32BIT_MASK)
> ahd->flags |= AHD_39BIT_ADDRESSING;
> - }
> + else
> + dma_set_mask(dev, DMA_32BIT_MASK);
> +
> } else {
> - pci_set_dma_mask(pdev, DMA_32BIT_MASK);
> + dma_set_mask(dev, DMA_32BIT_MASK);
The logic here seems odd to me. Shouldn't we first check
dma_get_required_mask and the do dma_set_mask?
-
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