From 76cf3fc844a46b5cdb94da98bffcbd45d4c355b8 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Wed, 10 Apr 2013 00:36:38 +0000 Subject: i2c-designware-pci: use managed functions pcim_* and devm_* This makes the error handling much more simpler than open-coding everything and in addition makes the probe function smaller an tidier. Signed-off-by: Andy Shevchenko Signed-off-by: Mika Westerberg Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-designware-pcidrv.c | 68 ++++++++---------------------- 1 file changed, 17 insertions(+), 51 deletions(-) (limited to 'drivers/i2c/busses/i2c-designware-pcidrv.c') diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c index eed149d0b68d..aacb64e916a5 100644 --- a/drivers/i2c/busses/i2c-designware-pcidrv.c +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c @@ -212,8 +212,6 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, { struct dw_i2c_dev *dev; struct i2c_adapter *adap; - unsigned long start, len; - void __iomem *base; int r; struct dw_pci_controller *controller; @@ -225,51 +223,30 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, controller = &dw_pci_controllers[id->driver_data]; - r = pci_enable_device(pdev); + r = pcim_enable_device(pdev); if (r) { dev_err(&pdev->dev, "Failed to enable I2C PCI device (%d)\n", r); - goto exit; + return r; } - /* Determine the address of the I2C area */ - start = pci_resource_start(pdev, 0); - len = pci_resource_len(pdev, 0); - if (!start || len == 0) { - dev_err(&pdev->dev, "base address not set\n"); - r = -ENODEV; - goto exit; - } - - r = pci_request_region(pdev, 0, DRIVER_NAME); + r = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev)); if (r) { - dev_err(&pdev->dev, "failed to request I2C region " - "0x%lx-0x%lx\n", start, - (unsigned long)pci_resource_end(pdev, 0)); - goto exit; - } - - base = ioremap_nocache(start, len); - if (!base) { dev_err(&pdev->dev, "I/O memory remapping failed\n"); - r = -ENOMEM; - goto err_release_region; + return r; } - - dev = kzalloc(sizeof(struct dw_i2c_dev), GFP_KERNEL); - if (!dev) { - r = -ENOMEM; - goto err_release_region; - } + dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; init_completion(&dev->cmd_complete); mutex_init(&dev->lock); dev->clk = NULL; dev->controller = controller; dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz; - dev->base = base; - dev->dev = get_device(&pdev->dev); + dev->base = pcim_iomap_table(pdev)[0]; + dev->dev = &pdev->dev; dev->functionality = I2C_FUNC_I2C | I2C_FUNC_SMBUS_BYTE | @@ -284,7 +261,7 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, dev->rx_fifo_depth = controller->rx_fifo_depth; r = i2c_dw_init(dev); if (r) - goto err_iounmap; + return r; adap = &dev->adapter; i2c_set_adapdata(adap, dev); @@ -296,10 +273,11 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, snprintf(adap->name, sizeof(adap->name), "i2c-designware-pci-%d", adap->nr); - r = request_irq(pdev->irq, i2c_dw_isr, IRQF_SHARED, adap->name, dev); + r = devm_request_irq(&pdev->dev, pdev->irq, i2c_dw_isr, IRQF_SHARED, + adap->name, dev); if (r) { dev_err(&pdev->dev, "failure requesting irq %i\n", dev->irq); - goto err_iounmap; + return r; } i2c_dw_disable_int(dev); @@ -307,24 +285,16 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, r = i2c_add_numbered_adapter(adap); if (r) { dev_err(&pdev->dev, "failure adding adapter\n"); - goto err_free_irq; + return r; } + /* Increase reference counter */ + get_device(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); pm_runtime_allow(&pdev->dev); return 0; - -err_free_irq: - free_irq(pdev->irq, dev); -err_iounmap: - iounmap(dev->base); - put_device(&pdev->dev); - kfree(dev); -err_release_region: - pci_release_region(pdev, 0); -exit: - return r; } static void i2c_dw_pci_remove(struct pci_dev *pdev) @@ -337,10 +307,6 @@ static void i2c_dw_pci_remove(struct pci_dev *pdev) i2c_del_adapter(&dev->adapter); put_device(&pdev->dev); - - free_irq(dev->irq, dev); - kfree(dev); - pci_release_region(pdev, 0); } /* work with hotplug and coldplug */ -- cgit v1.2.3