• David Brownell's avatar
    [PATCH] usbcore dma updates (and doc) · 61426cf2
    David Brownell authored
    Attached is a patch leveraging some of the new generic dma stuff:
    
    - Replaces dma mapping calls in usbcore with generic equivalents.
       This is a minor code shrink (which we'd hoped could happen).
    
    - Pass dma mask along, so net drivers can notice it'd be good to
       set NETIF_F_HIGHDMA; or scsi ones can set highmem_io.  (Some
       Intel EHCI setups are able to support this kind of DMA.)
    
    - Updates one net driver (usbnet) to set NETIF_F_HIGHDMA when
       appropriate, mostly as an example (since I can't test this).
    
    - Provides Documentation/usb/dma.txt, describing current APIs.
       (Unchanged by this patch, except dma mask visibility.)
    
    - Converted another info() to dev_info(), and likewise a couple
       dbg() to dev_dbg() conversions in the modified routine.
    
    The number of FIXMEs was conserved: the generic API doesn't yet
    fix the error reporting bugs in the PCI-specific mapping API.
    61426cf2
dma.txt 4.23 KB