[media] solo6x10: fix 'dma from stack' warning

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/staging/media/solo6x10/solo6x10-disp.c

@@ -213,19 +213,21 @@ int solo_set_motion_threshold(struct solo_dev *solo_dev, u8 ch, u16 val)
 int solo_set_motion_block(struct solo_dev *solo_dev, u8 ch,
 		const u16 *thresholds)
 {
+	const unsigned size = sizeof(u16) * 64;
 	u32 off = SOLO_MOT_FLAG_AREA + ch * SOLO_MOT_THRESH_SIZE * 2;
-	u16 buf[64];
+	u16 *buf;
 	int x, y;
 	int ret = 0;
 
-	memset(buf, 0, sizeof(buf));
+	buf = kzalloc(size, GFP_KERNEL);
 	for (y = 0; y < SOLO_MOTION_SZ; y++) {
 		for (x = 0; x < SOLO_MOTION_SZ; x++)
 			buf[x] = cpu_to_le16(thresholds[y * SOLO_MOTION_SZ + x]);
 		ret |= solo_p2m_dma(solo_dev, 1, buf,
-			SOLO_MOTION_EXT_ADDR(solo_dev) + off + y * sizeof(buf),
-			sizeof(buf), 0, 0);
+			SOLO_MOTION_EXT_ADDR(solo_dev) + off + y * size,
+			size, 0, 0);
 	}
+	kfree(buf);
 	return ret;
 }