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dmaengine: xilinx: xdma: Fix the count of elapsed periods in cyclic mode

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Xilinx DMA engine is capable of keeping track of the number of elapsed
periods and this is an increasing 32-bit counter which is only reset
when turning off the engine. No need to add this value to our local
counter.

Fixes: cd8c732ce1 ("dmaengine: xilinx: xdma: Support cyclic transfers")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20231130111315.729430-2-miquel.raynal@bootlin.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Miquel Raynal 2023-11-30 12:13:12 +01:00 committed by Vinod Koul
parent e271c0ba3f
commit 26ee018ff6
1 changed files with 4 additions and 2 deletions
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6
drivers/dma/xilinx/xdma.c
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@ -754,9 +754,9 @@ static irqreturn_t xdma_channel_isr(int irq, void *dev_id)
if (ret)
goto out;
desc->completed_desc_num += complete_desc_num;
if (desc->cyclic) {
desc->completed_desc_num = complete_desc_num;
ret = regmap_read(xdev->rmap, xchan->base + XDMA_CHAN_STATUS,
&st);
if (ret)
@ -768,6 +768,8 @@ static irqreturn_t xdma_channel_isr(int irq, void *dev_id)
goto out;
}
desc->completed_desc_num += complete_desc_num;
/*
* if all data blocks are transferred, remove and complete the request
*/