aic7xxx driver large integer warning

[Miguel Angel Flores <maf@sombragris.com>]

Hi list.

As I said yesterday, the 2.6.10rc3 kernel warns compiling the aic7xxxx 
SCSI driver:

---
drivers/scsi/aic7xxx/aic7xxx_osm_pci.c: In function 
`ahc_linux_pci_dev_probe':
drivers/scsi/aic7xxx/aic7xxx_osm_pci.c:229: warning: large integer 
implicitly truncated to unsigned type
---

[aic7xxx_osm_pci.c]
    mask_39bit = 0x7FFFFFFFFFULL;

mask_39bit type is dma_addr_t. However the length of dma_addr_t is 
defined in types.h.

[types.h]
    #ifdef CONFIG_HIGHMEM64G
    typedef u64 dma_addr_t;
    #else
    typedef u32 dma_addr_t;
    #endif
    typedef u64 dma64_addr_t;

I think the correct solution is to make the assignement only if 
CONFIG_HIGHMEM64G is defined:

[aic7xxx_osm_pci.c]
        mask_39bit = 0x7FFFFFFFFFULL;  //assignement
        if (sizeof(dma_addr_t) > 4 //CONFIG_HIGHMEM64G is defined
         && ahc_linux_get_memsize() > 0x80000000
         && pci_set_dma_mask(pdev, mask_39bit) == 0) {

            /* the correct position of the assignement IMHO */

            ahc->flags |= AHC_39BIT_ADDRESSING;
            ahc->platform_data->hw_dma_mask = mask_39bit;
        } else {
            if (pci_set_dma_mask(pdev, 0xFFFFFFFF)) {
                printk(KERN_WARNING "aic7xxx: No suitable DMA 
available.\n");
                        return (-ENODEV);
            }
            ahc->platform_data->hw_dma_mask = 0xFFFFFFFF;

Before I post a new patch, I wish to know your opinion.

Thanks,
MaF