From: Stefan Agner <stefan@agner.ch>
Date: Thu, 13 Nov 2014 11:56:02 +0000 (+0100)
Subject: dmaengine: fsl-edma: fix calculation of remaining bytes
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6ab55b214c625f4d56199f7ebd0b419f43f23bb2;p=linux-beck.git

dmaengine: fsl-edma: fix calculation of remaining bytes

If the current transfer control descriptor (TCD) was not yet started,
the address will be the same as the initial address. Hence test if the
current address is less than or equal to the start address of each TCD.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---

diff --git a/drivers/dma/fsl-edma.c b/drivers/dma/fsl-edma.c
index 3c5711d5fe97..58c6fc7e902e 100644
--- a/drivers/dma/fsl-edma.c
+++ b/drivers/dma/fsl-edma.c
@@ -386,7 +386,7 @@ static size_t fsl_edma_desc_residue(struct fsl_edma_chan *fsl_chan,
 					&(edesc->tcd[i].vtcd->daddr));
 
 		len -= size;
-		if (cur_addr > dma_addr && cur_addr < dma_addr + size) {
+		if (cur_addr >= dma_addr && cur_addr < dma_addr + size) {
 			len += dma_addr + size - cur_addr;
 			break;
 		}