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authorAxel Lin <axel.lin@ingics.com>2016-07-09 13:32:23 +0800
committerWolfram Sang <wsa@the-dreams.de>2016-07-14 21:21:56 +0900
commitcc4618813e4bc409cd22641f6001118ef4479cfc (patch)
tree878b151e216af1b63434713090a4b38c94c58e41 /drivers/i2c
parent9f6db9bfb58e0008c0d041d69cef3bcb6247dc52 (diff)
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>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-versatile.c46
1 files changed, 13 insertions, 33 deletions
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)