From 4a5cfa39465cad25dd736d7ceba8a5d32eea4ecc Mon Sep 17 00:00:00 2001 From: Annaliese McDermond Date: Fri, 21 Jun 2019 03:52:49 -0700 Subject: i2c: bcm2835: Move IRQ request after clock code in probe If any of the clock code in the probe fails and returns, the IRQ will not be freed. Moving the IRQ request to last allows it to be freed on any errors further up in the probe function. devm_ calls can apparently not be used because there are some potential race conditions that will arise. Fixes: bebff81fb8b9 ("i2c: bcm2835: Model Divider in CCF") Signed-off-by: Annaliese McDermond Acked-by: Stefan Wahren Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-bcm2835.c | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) (limited to 'drivers/i2c/busses') diff --git a/drivers/i2c/busses/i2c-bcm2835.c b/drivers/i2c/busses/i2c-bcm2835.c index 5b556274cdb6..512c63871bd3 100644 --- a/drivers/i2c/busses/i2c-bcm2835.c +++ b/drivers/i2c/busses/i2c-bcm2835.c @@ -416,20 +416,6 @@ static int bcm2835_i2c_probe(struct platform_device *pdev) if (IS_ERR(i2c_dev->regs)) return PTR_ERR(i2c_dev->regs); - irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!irq) { - dev_err(&pdev->dev, "No IRQ resource\n"); - return -ENODEV; - } - i2c_dev->irq = irq->start; - - ret = request_irq(i2c_dev->irq, bcm2835_i2c_isr, IRQF_SHARED, - dev_name(&pdev->dev), i2c_dev); - if (ret) { - dev_err(&pdev->dev, "Could not request IRQ\n"); - return -ENODEV; - } - mclk_name = of_clk_get_parent_name(pdev->dev.of_node, 0); bus_clk = bcm2835_i2c_register_div(&pdev->dev, mclk_name, i2c_dev); @@ -459,6 +445,20 @@ static int bcm2835_i2c_probe(struct platform_device *pdev) return ret; } + irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!irq) { + dev_err(&pdev->dev, "No IRQ resource\n"); + return -ENODEV; + } + i2c_dev->irq = irq->start; + + ret = request_irq(i2c_dev->irq, bcm2835_i2c_isr, IRQF_SHARED, + dev_name(&pdev->dev), i2c_dev); + if (ret) { + dev_err(&pdev->dev, "Could not request IRQ\n"); + return -ENODEV; + } + adap = &i2c_dev->adapter; i2c_set_adapdata(adap, i2c_dev); adap->owner = THIS_MODULE; -- cgit v1.2.3