On Wed, Oct 27, 2010 at 10:41:18 +0100, Martyn Welch wrote: > On 26/10/10 02:10, Emilio G. Cota wrote: > > From: Emilio G. Cota <cota@xxxxxxxxx> > > > > In a configuration with several bridges, each bridge is > > assigned a certain bus number depending on the order in which > > vme_register_bridge is called. This can complicate multi-bridge > > installations because the eventual bus numbers will depend > > on the order the bridges were loaded. > > > > The appended allows bridges to register with a bus number of > > their choice, while keeping the previous 'first come, first > > served' behaviour as the default. > > > > I can't see where this is being used. Each driver's .probe is fed with bus_number and slot_number. Normally the driver will check that pair against what it received through modparams and act accordingly. For this to be reliable bus numbering should be consistent on a given system, i.e. it should be possible to always allocate the same bus number to a given bus. Otherwise, depending on which bridge is installed first, we'd get different bus numbers assigned. Does that make it clearer now? > I assume this is a part of future changes you wish to make? AFAICT it affects the current model. Cheers Emilio _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
