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[v3,1/2] dmaengine: tegra210-adma: Add pre-check for cyclic callback

Message ID 75bbbd9f20e0ead30760f47f0fd2ee9b05d49254.1473186743.git.nicoleotsuka@gmail.com (mailing list archive)
State Changes Requested
Headers show

Commit Message

Nicolin Chen Sept. 6, 2016, 6:42 p.m. UTC 
ADMA driver will support more than cyclic type of transaction.
So this patch limit the cyclic callback for the cyclic type
only in order to support other types.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
---
 drivers/dma/tegra210-adma.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
index 09b46f7..5b5d298 100644
--- a/drivers/dma/tegra210-adma.c
+++ b/drivers/dma/tegra210-adma.c
@@ -111,6 +111,7 @@  struct tegra_adma_desc {
 	size_t				buf_len;
 	size_t				period_len;
 	size_t				num_periods;
+	bool				cyclic;
 };
 
 /*
@@ -408,7 +409,8 @@  static irqreturn_t tegra_adma_isr(int irq, void *dev_id)
 		return IRQ_NONE;
 	}
 
-	vchan_cyclic_callback(&tdc->desc->vd);
+	if (tdc->desc->cyclic)
+		vchan_cyclic_callback(&tdc->desc->vd);
 
 	spin_unlock_irqrestore(&tdc->vc.lock, flags);
 
@@ -557,6 +559,7 @@  static struct dma_async_tx_descriptor *tegra_adma_prep_dma_cyclic(
 	if (!desc)
 		return NULL;
 
+	desc->cyclic = true;
 	desc->buf_len = buf_len;
 	desc->period_len = period_len;
 	desc->num_periods = buf_len / period_len;