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Add a comment clarifying why we clear TWEF_AEN in twe_reset() now.

This commit is contained in:
thorpej 2003-09-23 23:10:53 +00:00
parent e43d001ea8
commit 765ddabe83
1 changed files with 9 additions and 2 deletions
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11
sys/dev/pci/twe.c
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@ -1,4 +1,4 @@
/* $NetBSD: twe.c,v 1.47 2003/09/23 23:08:54 thorpej Exp $ */
/* $NetBSD: twe.c,v 1.48 2003/09/23 23:10:53 thorpej Exp $ */
/*-
* Copyright (c) 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc.
@ -70,7 +70,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: twe.c,v 1.47 2003/09/23 23:08:54 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: twe.c,v 1.48 2003/09/23 23:10:53 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -653,6 +653,13 @@ twe_reset(struct twe_softc *sc)
* Pull AENs out of the controller; look for a soft reset AEN.
* Open code this, since we want to detect reset even if the
* queue for management tools is full.
*
* Note that since:
* - interrupts are blocked
* - we have reset the controller
* - acknowledged the pending ATTENTION
* that there is no way a pending asynchronous AEN fetch would
* finish, so clear the flag.
*/
sc->sc_flags &= ~TWEF_AEN;
for (got = 0;;) {