From: Robin Gong <yibin.gong@nxp.com>
Date: Tue, 19 Jun 2018 16:57:02 +0000 (+0800)
Subject: dmaengine: imx-sdma: remove the maximum limitation for bd numbers
X-Git-Tag: rel_imx_4.19.35_1.1.0~9463^2~1^2~8
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=36e8d3b133e16eb2aee8a53b9ed5cd34821f6123;p=linux.git

dmaengine: imx-sdma: remove the maximum limitation for bd numbers

No this limitation now after virtual dma used since bd is allocated
dynamically instead of static.

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Tested-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index d1d3494eba01..9f1a4621fd9a 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -285,7 +285,6 @@ struct sdma_context_data {
 	u32  scratch7;
 } __attribute__ ((packed));
 
-#define NUM_BD (int)(PAGE_SIZE / sizeof(struct sdma_buffer_descriptor))
 
 struct sdma_engine;
 
@@ -1290,13 +1289,6 @@ static struct dma_async_tx_descriptor *sdma_prep_slave_sg(
 	if (ret)
 		goto err_bd_out;
 
-	if (sg_len > NUM_BD) {
-		dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n",
-				channel, sg_len, NUM_BD);
-		ret = -EINVAL;
-		goto err_bd_out;
-	}
-
 	desc->chn_count = 0;
 	for_each_sg(sgl, sg, sg_len, i) {
 		struct sdma_buffer_descriptor *bd = &desc->bd[i];
@@ -1406,12 +1398,6 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
 	if (ret)
 		goto err_bd_out;
 
-	if (num_periods > NUM_BD) {
-		dev_err(sdma->dev, "SDMA channel %d: maximum number of sg exceeded: %d > %d\n",
-				channel, num_periods, NUM_BD);
-		goto err_bd_out;
-	}
-
 	if (period_len > 0xffff) {
 		dev_err(sdma->dev, "SDMA channel %d: maximum period size exceeded: %zu > %d\n",
 				channel, period_len, 0xffff);