From: Álvaro Fernández Rojas <noltari@gmail.com>
Date: Fri, 22 Mar 2019 17:22:31 +0000 (+0100)
Subject: dma: bcm6348: check if driver is enabled before send/recv
X-Git-Tag: v2019.07-rc1~26^2~27
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e4f907e968a754fd1180c364c90ba2a4a0398d7e;p=platform%2Fkernel%2Fu-boot.git

dma: bcm6348: check if driver is enabled before send/recv

This patch prevents errors when running tftpput.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
---

diff --git a/drivers/dma/bcm6348-iudma.c b/drivers/dma/bcm6348-iudma.c
index 1d3c192..e7bd1b2 100644
--- a/drivers/dma/bcm6348-iudma.c
+++ b/drivers/dma/bcm6348-iudma.c
@@ -324,6 +324,9 @@ static int bcm6348_iudma_receive(struct dma *dma, void **dst, void *metadata)
 	struct bcm6348_dma_desc *dma_desc = dma_desc = ch_priv->dma_ring;
 	int ret;
 
+	if (!ch_priv->running)
+		return -EINVAL;
+
 	/* get dma ring descriptor address */
 	dma_desc += ch_priv->desc_id;
 
@@ -369,6 +372,9 @@ static int bcm6348_iudma_send(struct dma *dma, void *src, size_t len,
 	struct bcm6348_dma_desc *dma_desc;
 	uint16_t status;
 
+	if (!ch_priv->running)
+                return -EINVAL;
+
 	/* flush cache */
 	bcm6348_iudma_fdc(src, len);