From: Jaejoon Yoo <joonyj7.yoo@samsung.com>
Date: Wed, 28 Dec 2016 06:19:54 +0000 (+0900)
Subject: DMA: svace fix: Add code for handling null (WGID: 58265).
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a0c571edbcd90d950ee05cc0e73f6dcdf2fb8df7;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

DMA: svace fix: Add code for handling null (WGID: 58265).

Change-Id: I168bd2e9effaa27ff1bdcdcce946905697f298b9
Signed-off-by: Jaejoon Yoo <joonyj7.yoo@samsung.com>
---

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index b5c831ee56ac..987309e25429 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2929,7 +2929,10 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
 	}
 
 	/* Return the last desc in the chain */
-	desc->txd.flags = flg;
+	if (desc)
+		desc->txd.flags = flg;
+	else
+		return NULL;
 	return &desc->txd;
 }