From d1d50b701052eb6b62b76813c71f7d5ba520c43d Mon Sep 17 00:00:00 2001
From: Jared McNeill <jmcneill@FreeBSD.org>
Date: Mon, 11 Jul 2016 20:14:50 +0000
Subject: [PATCH] Return early from bus_dmamap_load callback if the error
 indicator is set.

Reviewed by:	andrew, manu
---
 sys/arm/allwinner/a10_mmc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/arm/allwinner/a10_mmc.c b/sys/arm/allwinner/a10_mmc.c
index 461f1566aa95..aea5719febfd 100644
--- a/sys/arm/allwinner/a10_mmc.c
+++ b/sys/arm/allwinner/a10_mmc.c
@@ -364,6 +364,10 @@ a10_dma_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int err)
 
 	sc = (struct a10_mmc_softc *)arg;
 	sc->a10_dma_map_err = err;
+
+	if (err)
+		return;
+
 	dma_desc = sc->a10_dma_desc;
 	/* Note nsegs is guaranteed to be zero if err is non-zero. */
 	for (i = 0; i < nsegs; i++) {