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| author | Clark Wang <xiaoning.wang@nxp.com> | 2023-05-05 14:35:57 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-28 10:29:52 +0200 |
| commit | bb45dc7b67c5c162f40746e513078630d9802c53 (patch) | |
| tree | 698b96f3444869efec0a45118e2489312c78bd2f | |
| parent | f8d9d8f1727d2fb3935b9aec4e1058ef55c9e477 (diff) | |
| download | linux-stable-bb45dc7b67c5c162f40746e513078630d9802c53.tar.gz linux-stable-bb45dc7b67c5c162f40746e513078630d9802c53.tar.bz2 linux-stable-bb45dc7b67c5c162f40746e513078630d9802c53.zip | |
spi: lpspi: disable lpspi module irq in DMA mode
[ Upstream commit 9728fb3ce11729aa8c276825ddf504edeb00611d ]
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>
| -rw-r--r-- | drivers/spi/spi-fsl-lpspi.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index 5d98611dd999..c5ff6e8c45be 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -906,9 +906,14 @@ 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) { |