David Brownell wrote:
The worst case should be seven frames (maximum time any WDH irq would
be deferred) and two WDH irqs. That would even cover that mostly-safe
assumption that multi-TD interrupt transfers aren't happening (they're
pretty rare with full speed hardware).
I know now that
From: Mike Nuss [EMAIL PROTECTED]
The ZF Micro OHCI controller exhibits unexpected behavior that seems to be
related to high load. Under certain conditions, the controller will
complete a TD, remove it from the endpoint's queue, and fail to add it to
the donelist. This causes the endpoint to
On Wednesday 25 July 2007, Mike Nuss wrote:
David Brownell wrote:
This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag:
1. A watchdog routine periodically scans the OHCI structures to check
for orphaned TDs. In these cases the TD is taken back from the
On Wed, Jul 25, 2007 at 01:13:39PM -0700, David Brownell wrote:
On Wednesday 25 July 2007, Mike Nuss wrote:
Either way, this patch in its current form isn't safe.
Darn. OK, I'm sure Greg will know not to merge it.
Yup, consider it dropped, thanks for letting me know.
thanks,
greg k-h
David Brownell wrote:
This fix enhances the scope of the existing OHCI_QUIRK_ZFMICRO flag:
1. A watchdog routine periodically scans the OHCI structures to check
for orphaned TDs. In these cases the TD is taken back from the
controller and completed normally.
Of course, just after
On Wed, 25 Jul 2007, Mike Nuss wrote:
2. The logic is too naive. The quirk assumes that if HeadP and DoneP
remain equal (meaning that the HC's queue is empty) for at least one
frame, but the HCD still sees an outstanding TD, then that TD must be
lost. But it may be that even though the queue
