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From: Oleksandr Tymoshenko <gonzo@FreeBSD.org>
Date: Tue, 30 Aug 2016 01:31:03 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r305039 - head/sys/arm/ti
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Author: gonzo
Date: Tue Aug 30 01:31:03 2016
New Revision: 305039
URL: https://svnweb.freebsd.org/changeset/base/305039

Log:
  Fix TI PRUSS driver panic with INVARIANTS enabled
  
  Value passed as islocked argument to knlist_add should
  be consistent with actual lock state so add lock/unlock
  calls around knlist_add
  
  PR:		212120
  Submitted by:	Manuel Stuhn

Modified:
  head/sys/arm/ti/ti_pruss.c

Modified: head/sys/arm/ti/ti_pruss.c
==============================================================================
--- head/sys/arm/ti/ti_pruss.c	Tue Aug 30 01:01:41 2016	(r305038)
+++ head/sys/arm/ti/ti_pruss.c	Tue Aug 30 01:31:03 2016	(r305039)
@@ -310,7 +310,9 @@ ti_pruss_kqfilter(struct cdev *cdev, str
 	case EVFILT_READ:
 		kn->kn_hook = sc;
 		kn->kn_fop = &ti_pruss_kq_read;
+		mtx_lock(&sc->sc_mtx);
 		knlist_add(&sc->sc_selinfo.si_note, kn, 1);
+		mtx_unlock(&sc->sc_mtx);
 		break;
 	default:
 		return (EINVAL);