From: Prashant Malani <pmal...@chromium.org> Date: Sat, 24 Aug 2019 01:36:19 -0700
> get_registers() blindly copies the memory written to by the > usb_control_msg() call even if the underlying urb failed. > > This could lead to junk register values being read by the driver, since > some indirect callers of get_registers() ignore the return values. One > example is: > ocp_read_dword() ignores the return value of generic_ocp_read(), which > calls get_registers(). > > So, emulate PCI "Master Abort" behavior by setting the buffer to all > 0xFFs when usb_control_msg() fails. > > This patch is copied from the r8152 driver (v2.12.0) published by > Realtek (www.realtek.com). > > Signed-off-by: Prashant Malani <pmal...@chromium.org> Applied.
