tree 0eb8d890ab2985385f5eba7ea21759b54b043503
parent ef976ea33b4c44d6cd14ee63cb237c6bab40f91b
author Geert Uytterhoeven <geert@linux-m68k.org> 1455635457 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1456028575 -0800

usb: core: Allow compilation on platforms where NO_DMA=y

Some platforms don't have DMA, but we should still be able to build USB
drivers for these platforms. They could still be used through vhci_hcd,
usbip_host, or maybe something like USB passthrough in UML from a
capable host.

If NO_DMA=y:

    ERROR: "dma_pool_destroy" [drivers/usb/core/usbcore.ko] undefined!
    ERROR: "bad_dma_ops" [drivers/usb/core/usbcore.ko] undefined!
    ERROR: "dma_pool_free" [drivers/usb/core/usbcore.ko] undefined!
    ERROR: "dma_pool_alloc" [drivers/usb/core/usbcore.ko] undefined!
    ERROR: "dma_pool_create" [drivers/usb/core/usbcore.ko] undefined!

Add a few checks for CONFIG_HAS_DMA to fix this.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>