From e3a3c3a205554e564751cd9c0276b2af813d7a92 Mon Sep 17 00:00:00 2001 From: Pavel Machek Date: Tue, 18 Jun 2013 22:34:53 +0200 Subject: [PATCH] UIO: fix uio_pdrv_genirq with device tree but no interrupt If device is initialized from device tree, but has no interrupt assigned, uio will still try to request and interrupt old way, fails, and fails registration. This is wrong; don't try initializing irq using platform data if device tree is available. Simplified code based on suggestion by Grant Likely. Fixed memory leak in "irq can not be registered" error path. Signed-off-by: Pavel Machek Reported-by: Detlev Zundel Signed-off-by: Greg Kroah-Hartman --- drivers/uio/uio_pdrv_genirq.c | 25 ++++++++++--------------- 1 file changed, 10 insertions(+), 15 deletions(-) diff --git a/drivers/uio/uio_pdrv_genirq.c b/drivers/uio/uio_pdrv_genirq.c index 960809f010d7..97415492779e 100644 --- a/drivers/uio/uio_pdrv_genirq.c +++ b/drivers/uio/uio_pdrv_genirq.c @@ -103,24 +103,16 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev) int i; if (pdev->dev.of_node) { - int irq; - /* alloc uioinfo for one device */ uioinfo = kzalloc(sizeof(*uioinfo), GFP_KERNEL); if (!uioinfo) { ret = -ENOMEM; dev_err(&pdev->dev, "unable to kmalloc\n"); - goto bad2; + return ret; } uioinfo->name = pdev->dev.of_node->name; uioinfo->version = "devicetree"; - /* Multiple IRQs are not supported */ - irq = platform_get_irq(pdev, 0); - if (irq == -ENXIO) - uioinfo->irq = UIO_IRQ_NONE; - else - uioinfo->irq = irq; } if (!uioinfo || !uioinfo->name || !uioinfo->version) { @@ -148,12 +140,15 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev) if (!uioinfo->irq) { ret = platform_get_irq(pdev, 0); - if (ret < 0) { + uioinfo->irq = ret; + if (ret == -ENXIO && pdev->dev.of_node) + uioinfo->irq = UIO_IRQ_NONE; + else if (ret < 0) { dev_err(&pdev->dev, "failed to get IRQ\n"); - goto bad0; + goto bad1; } - uioinfo->irq = ret; } + uiomem = &uioinfo->mem[0]; for (i = 0; i < pdev->num_resources; ++i) { @@ -206,19 +201,19 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev) ret = uio_register_device(&pdev->dev, priv->uioinfo); if (ret) { dev_err(&pdev->dev, "unable to register uio device\n"); - goto bad1; + goto bad2; } platform_set_drvdata(pdev, priv); return 0; + bad2: + pm_runtime_disable(&pdev->dev); bad1: kfree(priv); - pm_runtime_disable(&pdev->dev); bad0: /* kfree uioinfo for OF */ if (pdev->dev.of_node) kfree(uioinfo); - bad2: return ret; } -- 2.20.1