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spi: lpspi: disable lpspi module irq in DMA mode 

[ Upstream commit 9728fb3ce1 ]

When all bits of IER are set to 0, we still can observe the lpspi irq events
when using DMA mode to transfer data.

So disable irq to avoid the too much irq events.

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
Link: https://lore.kernel.org/r/20230505063557.3962220-1-xiaoning.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Clark Wang 2023-05-05 14:35:57 +08:00 committed by Greg Kroah-Hartman
parent 39a77f005f
commit 06b9522ca8
1 changed files with 6 additions and 1 deletions
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7
drivers/spi/spi-fsl-lpspi.c
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@ -905,9 +905,14 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
ret = fsl_lpspi_dma_init(&pdev->dev, fsl_lpspi, controller);
if (ret == -EPROBE_DEFER)
goto out_pm_get;
if (ret < 0)
dev_err(&pdev->dev, "dma setup error %d, use pio\n", ret);
else
/*
* disable LPSPI module IRQ when enable DMA mode successfully,
* to prevent the unexpected LPSPI module IRQ events.
*/
disable_irq(irq);
ret = devm_spi_register_controller(&pdev->dev, controller);
if (ret < 0) {