[PATCH v5 5/7] dmaengine: imx-sdma: remove the maximum limitation for bd numbers
From: Robin Gong <hidden>
Date: 2018-06-19 08:59:27
Also in:
dmaengine, linux-serial, lkml
Subsystem:
dma generic offload engine subsystem, the rest · Maintainers:
Vinod Koul, Linus Torvalds
No this limitation now after virtual dma used since bd is allocated dynamically instead of static. Signed-off-by: Robin Gong <redacted> --- drivers/dma/imx-sdma.c | 14 -------------- 1 file changed, 14 deletions(-)
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index d1d3494..9f1a462 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);
--
2.7.4