On Wed, Jun 14, 2000, Greg KH <[EMAIL PROTECTED]> wrote:
> On Wed, Jun 14, 2000 at 01:05:38PM -0700, Johannes Erdfelt wrote:
> > On Tue, Jun 13, 2000, Greg KH <[EMAIL PROTECTED]> wrote:
> > > What happens if the configuration changes after the device is reset?
> > > Firmware download could cause this to happen.
> >
> > Hmm, problem. I'll reload the configuration from the device. If it has
> > changed, it will not go through the rest of the process of programming
> > the active configuration, etc. It will only program the device id.
> > The calling driver is then responsible for doing the right thing.
>
> That sounds like a good solution. So the driver will have to pay attention
> to the past and then current configuration, correct?
> (In reality this is probably a very rare occurrence, so until someone has
> some hardware that will do this, I don't really see this as a problem.)
Yes. They know this will happen so they will be ready for it.
I'll also make it return a value saying it didn't set the configuration,
etc.
> > > If usbdevfs calls the ioctl, then the disconnect and probe will not
> > > happen for the driver that is currently connected to this device,
> > > correct? That isn't a good thing, is it?
> >
> > I'll make the ioctl() simulate disconnect() and probe() for all interfaces
> > the calling process doesn't have claimed. Sound good?
>
> Yes, I like it.
>
> Randy, I like the current patch, as it is better than what we have now.
> And if Johannes changes it to implement the changes he has mentioned, I'll
> like it even better.
Randy, don't apply the patch I sent yesterday. I have most of the updates
I've mentioned coded. I just need to finish up some last tweaks (comments)
and test it. I'll post another patch today.
> For those of you who are wondering why I care so much about this, it
> relates directly to devices that implement the USB Device Firmware Upgrade
> spec (of which I am still trying to find a device that uses this spec, I
> know they are out there...)
I hope you can help me test this as well. I have a series of devices, but
I don't have the correct hardware to check all of the combinations.
JE
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