[PATCH] spi: mt65xx: Use IRQF_ONESHOT with threaded IRQ

[Fei Shao]

This driver is migrated to use threaded IRQ since commit 5972eb05ca32
("spi: spi-mt65xx: Use threaded interrupt for non-SPIMEM transfer"), and
we almost always want to disable the interrupt line to avoid excess
interrupts while the threaded handler is processing SPI transfer.
Use IRQF_ONESHOT for that purpose.

In practice, we see MediaTek devices show SPI transfer timeout errors
when communicating with ChromeOS EC in certain scenarios, and with
IRQF_ONESHOT, the issue goes away.

Signed-off-by: Fei Shao <fshao at chromium.org>
---

 drivers/spi/spi-mt65xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 4b40985af1ea..90e5813cfdc3 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -1320,7 +1320,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
 
 	ret = devm_request_threaded_irq(dev, irq, mtk_spi_interrupt,
 					mtk_spi_interrupt_thread,
-					IRQF_TRIGGER_NONE, dev_name(dev), host);
+					IRQF_ONESHOT, dev_name(dev), host);
 	if (ret)
 		return dev_err_probe(dev, ret, "failed to register irq\n");
 
-- 
2.52.0.305.g3fc767764a-goog