From cc4618813e4bc409cd22641f6001118ef4479cfc Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sat, 9 Jul 2016 13:32:23 +0800 Subject: i2c: versatile: Convert to use resource managed devm_* APIs Use devm_* APIs to simplify the code a bit. This patch also fixes the memory leak when unload the module. Signed-off-by: Axel Lin Tested-by: Liviu Dudau Acked-by: Liviu Dudau Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-versatile.c | 46 +++++++++++--------------------------- 1 file changed, 13 insertions(+), 33 deletions(-) (limited to 'drivers') diff --git a/drivers/i2c/busses/i2c-versatile.c b/drivers/i2c/busses/i2c-versatile.c index 240637f01d11..c73d2d22009e 100644 --- a/drivers/i2c/busses/i2c-versatile.c +++ b/drivers/i2c/busses/i2c-versatile.c @@ -70,28 +70,14 @@ static int i2c_versatile_probe(struct platform_device *dev) struct resource *r; int ret; + i2c = devm_kzalloc(&dev->dev, sizeof(struct i2c_versatile), GFP_KERNEL); + if (!i2c) + return -ENOMEM; + r = platform_get_resource(dev, IORESOURCE_MEM, 0); - if (!r) { - ret = -EINVAL; - goto err_out; - } - - if (!request_mem_region(r->start, resource_size(r), "versatile-i2c")) { - ret = -EBUSY; - goto err_out; - } - - i2c = kzalloc(sizeof(struct i2c_versatile), GFP_KERNEL); - if (!i2c) { - ret = -ENOMEM; - goto err_release; - } - - i2c->base = ioremap(r->start, resource_size(r)); - if (!i2c->base) { - ret = -ENOMEM; - goto err_free; - } + i2c->base = devm_ioremap_resource(&dev->dev, r); + if (IS_ERR(i2c->base)) + return PTR_ERR(i2c->base); writel(SCL | SDA, i2c->base + I2C_CONTROLS); @@ -105,18 +91,12 @@ static int i2c_versatile_probe(struct platform_device *dev) i2c->adap.nr = dev->id; ret = i2c_bit_add_numbered_bus(&i2c->adap); - if (ret >= 0) { - platform_set_drvdata(dev, i2c); - return 0; - } - - iounmap(i2c->base); - err_free: - kfree(i2c); - err_release: - release_mem_region(r->start, resource_size(r)); - err_out: - return ret; + if (ret < 0) + return ret; + + platform_set_drvdata(dev, i2c); + + return 0; } static int i2c_versatile_remove(struct platform_device *dev) -- cgit v1.2.3-58-ga151