Author: avg
Date: Thu Jun 4 13:18:21 2020
New Revision: 361788
URL: https://svnweb.freebsd.org/changeset/base/361788
Log:
superio: do not assume that current LDN cannot change after config exit
That assumption should be true when superio(4) uses the hardware
exlusively. But it turns out to not hold on some real systems.
So, err on the side of correctness rather than performance.
Clear current_ldn in sio_conf_exit.
Reported by: bz
Tested by: bz
MFC after: 1 week
Modified:
head/sys/dev/superio/superio.c
Modified: head/sys/dev/superio/superio.c
==============================================================================
--- head/sys/dev/superio/superio.c Thu Jun 4 13:06:49 2020
(r361787)
+++ head/sys/dev/superio/superio.c Thu Jun 4 13:18:21 2020
(r361788)
@@ -190,6 +190,7 @@ static void
sio_conf_exit(struct siosc *sc)
{
sc->methods->exit(sc->io_res, sc->io_port);
+ sc->current_ldn = 0xff;
mtx_unlock(&sc->conf_lock);
}
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