[RFT PATCH 0/4] usb: dwc2: Fixes and improvements

[Guenter Roeck]

This series addresses the following problems:

- Fix receive buffer corruptions
- Fix receive transfers with 0 byte transfer length
- Abort transactions after unknown receive errors
  if the receive buffer is full
- Reduce "trimming xfer length" logging noise

The problems fixed with this series were observed when connecting
a DM9600 Ethernet adapter to Veyron Chromebooks such as the ASUS
Chromebook C201PA. The series was tested extensively with this and
other adapters.

The observed problems are also reported when tethering various
phones, so test coverage with such phones would be very appreciated.

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Guenter Roeck (4):
      usb: dwc2: Simplify and fix DMA alignment code
      usb: dwc2: Do not update data length if it is 0 on inbound transfers
      usb: dwc2: Abort transaction after errors with unknown reason
      usb: dwc2: Make "trimming xfer length" a debug message

 drivers/usb/dwc2/hcd.c      | 82 ++++++++++++++++++++++++---------------------
 drivers/usb/dwc2/hcd_intr.c | 14 +++++++-
 2 files changed, 56 insertions(+), 40 deletions(-)