Author: mav
Date: Thu Oct 15 17:40:02 2020
New Revision: 366733
URL: https://svnweb.freebsd.org/changeset/base/366733
Log:
Drop unsolicited responses to the still attaching CODECs.
It is reported to fix kernel panics when early unsolicited responses
delivered to the CODEC device not having driver attached yet.
PR: 250248
Reported by: Rajeev Pillai <rajeev_v_pil...@yahoo.com>
Reviewed by: avg
MFC after: 2 weeks
Modified:
head/sys/dev/sound/pci/hda/hdac.c
Modified: head/sys/dev/sound/pci/hda/hdac.c
==============================================================================
--- head/sys/dev/sound/pci/hda/hdac.c Thu Oct 15 17:12:58 2020
(r366732)
+++ head/sys/dev/sound/pci/hda/hdac.c Thu Oct 15 17:40:02 2020
(r366733)
@@ -990,7 +990,8 @@ hdac_unsolq_flush(struct hdac_softc *sc)
sc->unsolq_rp %= HDAC_UNSOLQ_MAX;
cad = sc->unsolq[sc->unsolq_rp++];
sc->unsolq_rp %= HDAC_UNSOLQ_MAX;
- if ((child = sc->codecs[cad].dev) != NULL)
+ if ((child = sc->codecs[cad].dev) != NULL &&
+ device_is_attached(child))
HDAC_UNSOL_INTR(child, resp);
ret++;
}
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