| From d12b2a0d5eb0e63010316826b44c4fee89a55d79 Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Wed, 23 Dec 2020 18:21:53 +0100 |
| Subject: i2c: rcar: make sure irq is not threaded on Gen2 and earlier |
| MIME-Version: 1.0 |
| Content-Type: text/plain; charset=UTF-8 |
| Content-Transfer-Encoding: 8bit |
| |
| From: Wolfram Sang <wsa+renesas@sang-engineering.com> |
| |
| [ Upstream commit 24c6d4bc563881539d2cd4433e502436ad87d512 ] |
| |
| Ensure this irq runs as fast as possible. |
| |
| Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> |
| Reviewed-by: Niklas Sรถderlund <niklas.soderlund+renesas@ragnatech.se> |
| Signed-off-by: Wolfram Sang <wsa@kernel.org> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| 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; |
| -- |
| 2.30.2 |
| |
