CVS commit: src/sys/kern

["Jason R Thorpe" <thorpej%netbsd.org@localhost>]

Module Name:    src
Committed By:   thorpej
Date:           Thu Jan 28 15:53:46 UTC 2021

Modified Files:
        src/sys/kern: subr_device.c

Log Message:
In device_is_a(), handle dev or dev->dv_cfdriver being NULL.  This
makes the calling pattern:

        device_is_a(device_parent(dev), "whatever")

safe.


To generate a diff of this commit:
cvs rdiff -u -r1.3 -r1.4 src/sys/kern/subr_device.c

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