From 24c6d4bc563881539d2cd4433e502436ad87d512 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Wed, 23 Dec 2020 18:21:53 +0100 Subject: [PATCH] i2c: rcar: make sure irq is not threaded on Gen2 and earlier MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Ensure this irq runs as fast as possible. Signed-off-by: Wolfram Sang Reviewed-by: Niklas Söderlund Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-rcar.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index ad6630e3cc77..3c9c3a6f7ac8 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -928,6 +928,7 @@ static int rcar_i2c_probe(struct platform_device *pdev) struct rcar_i2c_priv *priv; struct i2c_adapter *adap; struct device *dev = &pdev->dev; + unsigned long irqflags = 0; int ret; /* Otherwise logic will break because some bytes must always use PIO */ @@ -976,6 +977,9 @@ static int rcar_i2c_probe(struct platform_device *pdev) rcar_i2c_write(priv, ICSAR, 0); /* Gen2: must be 0 if not using slave */ + if (priv->devtype < I2C_RCAR_GEN3) + irqflags |= IRQF_NO_THREAD; + if (priv->devtype == I2C_RCAR_GEN3) { priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL); if (!IS_ERR(priv->rstc)) { @@ -995,7 +999,7 @@ static int rcar_i2c_probe(struct platform_device *pdev) priv->flags |= ID_P_HOST_NOTIFY; priv->irq = platform_get_irq(pdev, 0); - ret = devm_request_irq(dev, priv->irq, rcar_i2c_irq, 0, dev_name(dev), priv); + ret = devm_request_irq(dev, priv->irq, rcar_i2c_irq, irqflags, dev_name(dev), priv); if (ret < 0) { dev_err(dev, "cannot get irq %d\n", priv->irq); goto out_pm_disable; -- 2.11.0