tree 52941e00b05df6c1bfe228fd193fdb09cf963d15
parent ccf77cc4af5b048e20cfd9327fcc286cb69c34cc
author David Brownell <david-b@pacbell.net> 1144104544 -0700
committer Greg Kroah-Hartman <gregkh@suse.de> 1147815237 -0700

[PATCH] SPI: busnum == 0 needs to work

We need to be able to have a "SPI bus 0" matching chip numbering; but
that number was wrongly used to flag dynamic allocation of a bus number.

This patch resolves that issue; now negative numbers trigger dynamic alloc.

It also updates the how-to-write-a-controller-driver overview to mention
this stuff.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>