CVS commit: src/sys/dev/usb

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Fri Apr  7 09:39:48 UTC 2023

Modified Files:
        src/sys/dev/usb: xhci.c xhcivar.h

Log Message:
xhci(4): Defer root intr xfers while polling.

Root intr xfers require taking adaptive locks, which is forbidden
while polling.

This is not great -- any USB transfer completion callbacks might try
to take adaptive locks, not just uhub_intr, and that will always
causes trouble.  We get lucky with ukbd_intr because it's not
MP-safe, so it relies only on the kernel lock (a spin lock) anyway.
But this change brings xhci in line with ehci.

PR kern/57326

XXX pullup-8
XXX pullup-9
XXX pullup-10


To generate a diff of this commit:
cvs rdiff -u -r1.175 -r1.176 src/sys/dev/usb/xhci.c
cvs rdiff -u -r1.22 -r1.23 src/sys/dev/usb/xhcivar.h

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