Commit 26ee018f authored by Miquel Raynal's avatar Miquel Raynal Committed by Vinod Koul
Browse files

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



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: cd8c732c ("dmaengine: xilinx: xdma: Support cyclic transfers")
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20231130111315.729430-2-miquel.raynal@bootlin.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent e271c0ba

drivers/dma/xilinx/xdma.c

+4 −2
Original line number Diff line number Diff line
@@ -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

	 */