[PATCH v2 0/3] usb: gadget: functionfs: DMABUF import interface

[Paul Cercueil <paul@crapouillou.net>]

Hi,

This small patchset adds three new IOCTLs that can be used to attach,
detach, or transfer from/to a DMABUF object.

Changes since v1:
- patch [2/3] is new. I had to reuse a piece of code that was already
  duplicated in the driver, so I factorized the code.
- Make ffs_dma_resv_lock() static
- Add MODULE_IMPORT_NS(DMA_BUF);
- The attach/detach functions are now performed without locking the
  eps_lock spinlock. The transfer function starts with the spinlock
  unlocked, then locks it before allocating and queueing the USB
  transfer.

Cheers,
-Paul

Paul Cercueil (3):
  usb: gadget: Support already-mapped DMA SGs
  usb: gadget: functionfs: Factorize wait-for-endpoint code
  usb: gadget: functionfs: Add DMABUF import interface

 drivers/usb/gadget/function/f_fs.c  | 467 ++++++++++++++++++++++++++--
 drivers/usb/gadget/udc/core.c       |   7 +-
 include/linux/usb/gadget.h          |   2 +
 include/uapi/linux/usb/functionfs.h |  14 +-
 4 files changed, 468 insertions(+), 22 deletions(-)

-- 
2.39.2