[src/trunk]: src/sys/dev/scsipi Add a DEBUG assert for the problem noted in P...

[maya <maya%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d2164f028781
branches:  trunk
changeset: 351766:d2164f028781
user:      maya <maya%NetBSD.org@localhost>
date:      Sun Feb 26 10:58:47 2017 +0000

description:
Add a DEBUG assert for the problem noted in PR kern/51731
of some drivers not sufficiently locking.

The relevant drivers might not work, but if someone gets around to them
then the problem could be visible.

sd doesn't trip the assert.

diffstat:

 sys/dev/scsipi/scsipi_base.h |  3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diffs (17 lines):

diff -r b935eef1527b -r d2164f028781 sys/dev/scsipi/scsipi_base.h
--- a/sys/dev/scsipi/scsipi_base.h      Sun Feb 26 10:49:25 2017 +0000
+++ b/sys/dev/scsipi/scsipi_base.h      Sun Feb 26 10:58:47 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: scsipi_base.h,v 1.23 2016/11/20 15:37:19 mlelstv Exp $ */
+/*     $NetBSD: scsipi_base.h,v 1.24 2017/02/26 10:58:47 maya Exp $    */
 
 /*-
  * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc.
@@ -96,6 +96,7 @@
     struct buf *bp, int flags)
 {
 
+       KDASSERT(mutex_owned(chan_mtx(periph->periph_channel)));
        return scsipi_make_xs_internal(periph, cmd, cmdlen, data_addr,
            datalen, retries, timeout, bp, flags | XS_CTL_NOSLEEP);
 }