CVS commit: src/sys/dev/i2c

["Julian Coleman" <jdc%netbsd.org@localhost>]

Module Name:    src
Committed By:   jdc
Date:           Sat Dec  5 14:48:09 UTC 2020

Modified Files:
        src/sys/dev/i2c: pcf8574.c

Log Message:
When matching, try a read in case this is an optional device and isn't
actually present.
Make sure that we set sc->sc_sme to NULL in failure cases and when we
detach in order to avoid calling sysmon_envsys_unregister() with an
invalid struct.


To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/sys/dev/i2c/pcf8574.c

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