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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 <axel.lin@ingics.com>
Tested-by: Liviu Dudau <Liviu.Dudau@arm.com>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Axel Lin 2016-07-09 13:32:23 +08:00 committed by Wolfram Sang
parent 9f6db9bfb5
commit cc4618813e
1 changed files with 12 additions and 32 deletions
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44
drivers/i2c/busses/i2c-versatile.c
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@ -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:
if (ret < 0)
return ret;
platform_set_drvdata(dev, i2c);
return 0;
}
static int i2c_versatile_remove(struct platform_device *dev)