[src/trunk]: src/sys/arch/arm/broadcom Handle error when setting DMA transfer.

[mlelstv <mlelstv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4a1d7ce53070
branches:  trunk
changeset: 339775:4a1d7ce53070
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Sun Aug 09 13:03:10 2015 +0000

description:
Handle error when setting DMA transfer.

diffstat:

 sys/arch/arm/broadcom/bcm2835_emmc.c |  9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diffs (30 lines):

diff -r 0ccee4c70d99 -r 4a1d7ce53070 sys/arch/arm/broadcom/bcm2835_emmc.c
--- a/sys/arch/arm/broadcom/bcm2835_emmc.c      Sun Aug 09 13:01:21 2015 +0000
+++ b/sys/arch/arm/broadcom/bcm2835_emmc.c      Sun Aug 09 13:03:10 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bcm2835_emmc.c,v 1.26 2015/08/03 10:27:32 jmcneill Exp $       */
+/*     $NetBSD: bcm2835_emmc.c,v 1.27 2015/08/09 13:03:10 mlelstv Exp $        */
 
 /*-
  * Copyright (c) 2012 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bcm2835_emmc.c,v 1.26 2015/08/03 10:27:32 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bcm2835_emmc.c,v 1.27 2015/08/09 13:03:10 mlelstv Exp $");
 
 #include "bcmdmac.h"
 
@@ -309,7 +309,10 @@
        sc->sc_state = EMMC_DMA_STATE_BUSY;
        bcm_dmac_set_conblk_addr(sc->sc_dmac,
            sc->sc_dmamap->dm_segs[0].ds_addr);
-       bcm_dmac_transfer(sc->sc_dmac);
+       error = bcm_dmac_transfer(sc->sc_dmac);
+       if (error)
+               return error;
+
        while (sc->sc_state == EMMC_DMA_STATE_BUSY) {
                error = cv_timedwait(&sc->sc_cv, plock, hz * 10);
                if (error == EWOULDBLOCK) {