CVS commit: src/sys/dev/usb

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

Module Name:    src
Committed By:   riastradh
Date:           Sun Mar 13 11:29:55 UTC 2022

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

Log Message:
xhci(4): Restore synchronous abort.

In revision 1.155, I made the logic to abort the hardware
asynchronous, under the misapprehension that it is necessary for
ubm_abortx not to release the bus lock.

Not only is this not necessary, but it is harmful to for the logic to
be asynchronous because the caller assumes the hardware won't use any
DMA buffers by the time ubm_abortx has returned so it is safe to
recycle them -- which is false if we don't synchronously wait for the
hardware to stop.


To generate a diff of this commit:
cvs rdiff -u -r1.160 -r1.161 src/sys/dev/usb/xhci.c

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