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Ensure correctness of bus_dmamap_sync operations. Shouldn't affect RPI.

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This commit is contained in:
skrll 2014-10-02 11:58:12 +00:00
parent c658164936
commit 8cec64905f
1 changed files with 3 additions and 2 deletions
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5
sys/arch/arm/broadcom/bcm2835_mbox.c
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@ -1,4 +1,4 @@
/* $NetBSD: bcm2835_mbox.c,v 1.6 2013/04/14 15:11:52 skrll Exp $ */
/* $NetBSD: bcm2835_mbox.c,v 1.7 2014/10/02 11:58:12 skrll Exp $ */
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: bcm2835_mbox.c,v 1.6 2013/04/14 15:11:52 skrll Exp $");
__KERNEL_RCSID(0, "$NetBSD: bcm2835_mbox.c,v 1.7 2014/10/02 11:58:12 skrll Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -162,6 +162,7 @@ bcmmbox_request(uint8_t chan, void *buf, size_t buflen, uint32_t *pres)
bus_dmamap_sync(sc->sc_dmat, map, 0, buflen, BUS_DMASYNC_POSTWRITE);
bus_dmamap_sync(sc->sc_dmat, map, 0, buflen, BUS_DMASYNC_PREREAD);
bcmmbox_read(chan, pres);
bus_dmamap_sync(sc->sc_dmat, map, 0, buflen, BUS_DMASYNC_POSTREAD);
mutex_exit(&sc->sc_lock);