On 7/5/06, David Brownell <[EMAIL PROTECTED]> wrote: > On Wednesday 05 July 2006 1:52 pm, Christopher Montgomery wrote: > > On 7/5/06, Alan Stern <[EMAIL PROTECTED]> wrote: > > > > > I'm hampered by lack of detailed knowledge of the driver. However it > > > seems to me that those two calls should affect the schedule (cheap) and > > > not the budget (expensive). > > > > Oh, hmm. That's actually not a bad idea. Some part of me is saying 'duh'. > > Part of you should also be saying "hey, isn't that exactly > what Dave was referring to earlier?" The current driver > works exactly that way.
The current code at least partially rebudgets each time, so I *was* following the way the current code works. That call to check_intr_schedule() in qh_schedule() isn't a no-op. The fully seperate budgeting could indeed make it a complete no-op, but I followed the current pattern when qh budget/schedule was always done at the same time. I hadn't stopped to think that having a 100% seperable, persistent budget was a way out because I had assumed that having interrupts popping, throwing errors, while a different code path was simultaneously removing the structures tossing the errors was incorrect, unwanted behavior that should be fixed. Now you have impressed it is not, and you [all] have also mentioned a compromise solution that's obvious. Thanks. This is the discussion I wanted to be having. > > > Go back and re-read what you yourself wrote above: the URB is resubmitted > > > by core/hub.c. Not by ehci-hcd. > > > > Quite right; I also stated clearly when I realized I was confused and > > I corrected myself, but the argument continued. > > ... because in most other places you were saying that it's EHCI that > resubmits the URB. *BIG* difference. Yes, I confused a point and it is a big difference. I restated, and my current question w.r.t ehci-hcd still stands. The resubmission code is in ehci-hcd, and I pasted the code block. If there is still confusion, I'll go back and restate from scratch very carefully. I really do want a complete understanding of what is happening and why, and I'm resisting the hacker urge to argue for argument's sake ;-) Monty Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
