From: Srikanth Thokala <srikanth.thokala@xilinx.com>
Date: Wed, 5 Nov 2014 18:37:01 +0000 (+0200)
Subject: dmaengine: xilinx: vdma: Allow only one chunk in a line
X-Git-Tag: v3.19-rc1~100^2~25
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a5e48e243be8073d34524a824fe354d2f2e1fa24;p=karo-tx-linux.git

dmaengine: xilinx: vdma: Allow only one chunk in a line

This patch adds a sanity check to see if frame_size is 1.

Signed-off-by: Srikanth Thokala <sthokal@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---

diff --git a/drivers/dma/xilinx/xilinx_vdma.c b/drivers/dma/xilinx/xilinx_vdma.c
index 10937945a527..3d3f70dd9dea 100644
--- a/drivers/dma/xilinx/xilinx_vdma.c
+++ b/drivers/dma/xilinx/xilinx_vdma.c
@@ -942,6 +942,9 @@ xilinx_vdma_dma_prep_interleaved(struct dma_chan *dchan,
 	if (!xt->numf || !xt->sgl[0].size)
 		return NULL;
 
+	if (xt->frame_size != 1)
+		return NULL;
+
 	/* Allocate a transaction descriptor. */
 	desc = xilinx_vdma_alloc_tx_descriptor(chan);
 	if (!desc)