Re: [PATCH] staging: axis-fifo: Fix three real issues

[Breno Rodrigues Alves <breno3011alves@gmail.com>]

Hi Greg,

You are right, and I apologize for the noise.  No tool told me this -
it was my own reasoning.  I had the (outdated) impression that passing
an ERR_PTR parent from debugfs_create_dir() to debugfs_create_file()
would trigger a WARN in the debugfs core.  That was true years ago, but
modern debugfs handles ERR_PTR parents gracefully, and I should have
verified the claim on a CONFIG_DEBUG_FS=n kernel before sending the
patch.

The other two changes are independent of that assumption:

  - the -EINVAL -> -ENOBUFS change in axis_fifo_read(), which changes
    the errno returned when the user buffer is smaller than the
    available data;

  - the removal of the unused 'struct resource *r_mem' local.

If either of those is worth keeping, I can resend with just those two.
If the whole patch looks like churn, please let me know and I will drop
it.

Sorry again,
Breno