CVS commit: src/sys/dev/usb

[Matthias Drochner <drochner%netbsd.org@localhost>]

Module Name:    src
Committed By:   drochner
Date:           Fri Mar 23 21:51:34 UTC 2007

Modified Files:
        src/sys/dev/usb: uhub.c

Log Message:
Work around imperfect hub emulation in the ehci root hub (ohci is affected
too, but that's not critical): real hubs send port status change
notifications until acknowledged, ehci/ohci send only once so there is
a chance that this gets lost if notifications are disabled during a scan.
The temporary fix is to force a rescan; the real fix will involve a
change in interrupt handling in ehci/ohci which needs more work and
testing.
ehci is critical because a port status change during scan regularely
happens if a full/lowspeed device is connected, due to the handover
process.
Fixes a problem where full/lowspeed devices were not reattached after
a disconnect, reported by Kouichirou Hiratsuka and Juan RP
on current-users.


To generate a diff of this commit:
cvs rdiff -r1.88 -r1.89 src/sys/dev/usb/uhub.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.