[PATCH v2 0/3] usb: Allow compilation on platforms where NO_DMA=y

[Geert Uytterhoeven <geert@linux-m68k.org>]

	Hi Greg,

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.

This patch series allows to compile USB on platforms where NO_DMA=y.
I've been using it for quite a while to make allmodconfig/allyesconfig
build for m68k/sun3.
Vegard used this on UML to read a USB flash drive plugged into the host
machine using USB-over-IP.

Changes compared to v1:
  - Replace remaining #ifdefs by IS_ENABLED() checks,
  - Add to patch description that this actually allows using USB on UML,
  - Add Acked-by.

Thanks!

Geert Uytterhoeven (3):
  usb: core: Allow compilation on platforms where NO_DMA=y
  usb: host: Host drivers relying on DMA should depend on HAS_DMA
  usb: dwc2: USB_DWC2 should depend on HAS_DMA

 drivers/usb/core/buffer.c | 18 ++++++++++++------
 drivers/usb/core/hcd.c    | 16 ++++++++++------
 drivers/usb/dwc2/Kconfig  |  1 +
 drivers/usb/host/Kconfig  |  5 ++++-
 4 files changed, 27 insertions(+), 13 deletions(-)

-- 
1.9.1

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds