From: Per Forlin <per.forlin@stericsson.com>
Date: Tue, 18 Oct 2011 16:39:47 +0000 (+0200)
Subject: dmaengine: ste_dma40: set dma max seg size
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b96710e5b22609aa6e4ba5c3936ea7f026a7c427;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

dmaengine: ste_dma40: set dma max seg size

Maximum DMA seg size is (0xffff x data_width).  If max seg
size is not set it deafults to 64k.  This results in failure
if transferring 64k in byte mode.
Large seg sizes may be supported by splitting large transfer.

Signed-off-by: Per Forlin <per.forlin@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
---

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 23c5573e62d..f5724d95ed4 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -344,6 +344,7 @@ struct d40_base {
 	int				  irq;
 	int				  num_phy_chans;
 	int				  num_log_chans;
+	struct device_dma_parameters	  dma_parms;
 	struct dma_device		  dma_both;
 	struct dma_device		  dma_slave;
 	struct dma_device		  dma_memcpy;
@@ -3362,6 +3363,13 @@ static int __init d40_probe(struct platform_device *pdev)
 	if (err)
 		goto failure;
 
+	base->dev->dma_parms = &base->dma_parms;
+	err = dma_set_max_seg_size(base->dev, STEDMA40_MAX_SEG_SIZE);
+	if (err) {
+		d40_err(&pdev->dev, "Failed to set dma max seg size\n");
+		goto failure;
+	}
+
 	d40_hw_init(base);
 
 	dev_info(base->dev, "initialized\n");