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From: Vladimir Kondratyev <wulf@FreeBSD.org>
Date: Sun, 3 Nov 2019 20:46:20 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r354297 - head/sys/dev/ichiic
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Author: wulf
Date: Sun Nov  3 20:46:20 2019
New Revision: 354297
URL: https://svnweb.freebsd.org/changeset/base/354297

Log:
  [ig4] Ignore stray interrupts

Modified:
  head/sys/dev/ichiic/ig4_iic.c

Modified: head/sys/dev/ichiic/ig4_iic.c
==============================================================================
--- head/sys/dev/ichiic/ig4_iic.c	Sun Nov  3 20:45:25 2019	(r354296)
+++ head/sys/dev/ichiic/ig4_iic.c	Sun Nov  3 20:46:20 2019	(r354297)
@@ -685,9 +685,12 @@ ig4iic_intr(void *cookie)
 	ig4iic_softc_t *sc = cookie;
 
 	mtx_lock(&sc->io_lock);
-	set_intr_mask(sc, 0);
-	reg_read(sc, IG4_REG_CLR_INTR);
-	wakeup(sc);
+	/* Ignore stray interrupts */
+	if (sc->intr_mask != 0 && reg_read(sc, IG4_REG_INTR_STAT) != 0) {
+		set_intr_mask(sc, 0);
+		reg_read(sc, IG4_REG_CLR_INTR);
+		wakeup(sc);
+	}
 	mtx_unlock(&sc->io_lock);
 }