From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Mon, 8 Dec 2008 17:50:25 +0000 (+0000)
Subject: [ARM] dma: ensure that the single entry sg is properly initialized
X-Git-Tag: firefly_0821_release~15211^2~52^2~3^2~8
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d667522fdf637ef1b425518afe11aedba80364b2;p=firefly-linux-kernel-4.4.55.git

[ARM] dma: ensure that the single entry sg is properly initialized

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/kernel/dma.c b/arch/arm/kernel/dma.c
index aab24f03ea14..e7828fcd9544 100644
--- a/arch/arm/kernel/dma.c
+++ b/arch/arm/kernel/dma.c
@@ -15,6 +15,7 @@
 #include <linux/init.h>
 #include <linux/spinlock.h>
 #include <linux/errno.h>
+#include <linux/scatterlist.h>
 
 #include <asm/dma.h>
 
@@ -37,6 +38,9 @@ int __init isa_dma_add(unsigned int chan, dma_t *dma)
 {
 	if (!dma->d_ops)
 		return -EINVAL;
+
+	sg_init_table(&dma->buf, 1);
+
 	if (dma_chan[chan])
 		return -EBUSY;
 	dma_chan[chan] = dma;