Kevin Wolf <kw...@redhat.com> writes: > The only way for chardev drivers to communicate an error was to return a NULL > pointer, which resulted in an error message that said _that_ something went > wrong, but not _why_. > > This patch changes the interface to return 0/-errno and updates > qemu_chr_open_opts to use strerror to display a more helpful error message.
Returning the result through a pointer is awkward. What about stuffing the error code into errno?
