[v3,0/4] usb: dwc3: gadget: Fix TRB preparation

Message

Thinh Nguyen Sept. 3, 2020, 2:06 a.m. UTC

There are a few issues in DWC3 driver when preparing for TRB.
The driver needs to account the following:

* MPS alignment for ZLP OUT direction
* Extra TRBs when checking for available TRBs
* SG entries size > request length

Along with these fixes, there are some cleanup/refactoring patches in this
series.

Changes in v3:
- Rebase on Felipe's testing/next branch with the remaining patches of this
  series

Changes in v2:
- Update remaining length when resume request
- Remove unused variables
- Add a missing "return 0" for dwc3_prepare_trbs()
- Update doc indicating dwc3_prepare_trbs() can return other -errno


Thinh Nguyen (4):
  usb: dwc3: gadget: Refactor preparing TRBs
  usb: dwc3: gadget: Account for extra TRB
  usb: dwc3: gadget: Rename misleading function names
  usb: dwc3: ep0: Skip ZLP setup for OUT

 drivers/usb/dwc3/ep0.c    |   2 +-
 drivers/usb/dwc3/gadget.c | 246 +++++++++++++++++---------------------
 2 files changed, 112 insertions(+), 136 deletions(-)


base-commit: 8bc2602e7a402664131d79251d59b262b896ca37