CVS commit: src/sys/dev/scsipi

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

Module Name:    src
Committed By:   riastradh
Date:           Tue Dec 21 22:53:21 UTC 2021

Modified Files:
        src/sys/dev/scsipi: scsiconf.c

Log Message:
scsi(4): Take kernel lock around entry into autoconf.

This code paths is entered by kthreads marked MP-safe, not just from
autoconf.

I'm not sure this is sufficient -- it's not clear to me whether
anything prevents concurrently scanning the same target.  Someone with
a better understanding of scsi(4) locking will have to audit this.

(For example, maybe it is guaranteed only to happen only either (a)
in autoconf, or (b) in a thread that doesn't start until autoconf is
done.  But I don't know -- and if it is this, it should be asserted
so we can verify it.)


To generate a diff of this commit:
cvs rdiff -u -r1.292 -r1.293 src/sys/dev/scsipi/scsiconf.c

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