Re: [Qemu-devel] [PATCH RESEND 1/3] usb-ccid: make ccid_write_data_block() cope with null buffers

[Gerd Hoffmann]

  Hi,

>  oops, there are hard-coded calls with NULL/0. I suppose to fix clang
> warning, it would need to check if data != null for memcpy.

I'd check for len > 0, and in that if branch we can also assert on data
== NULL and thereby check that len and data are consistent.

cheers,
  Gerd