[lkml]   [2003]   [Apr]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [Patch] DMA mapping API for Alpha
    On Tue, Apr 29, 2003 at 01:58:29PM +0200, Marc Zyngier wrote:
    > That's exactly what I wanted to avoid : It we feed NULL (for a non PCI
    > device) to pci_map_single (for example), we limit the max DMA address
    > to 24 bits, and this is quite bad for an EISA device, which is 32 bits
    > capable.

    Agreed, but what if your EISA-PCI bridge has only 30 address lines wired
    to PCI? Yes, we can check this for EISA device because it has *real*
    PCI parent (thanks, Marc :-), but what about ISA/legacy/whatever drivers?
    I doubt that all of them bother to set dma_mask pointer (so you can have
    an oops there).

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:35    [W:0.024 / U:1.976 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site