camcontrol rescan all fails if there is no bus 0

[Ed Maste]

On Sun, Oct 31, 2010 at 09:16:30PM +0200, Andriy Gapon wrote:

> Can you test a synthetic situation where you have e.g. bus 1, but no
> bus 0 ?  E.g. by having two umass devices connected during boot and
> then removing one of them.

Yes, good idea - stock camcontrol:

[root at edlaptop ~]# camcontrol rescan all
camcontrol: CAMIOCOMMAND ioctl failed: Invalid argument

With the patch:

[root at edlaptop ~]# ./camcontrol rescan all
Re-scan of bus 1 was successful

-Ed