i2c: __must_check fixes, i2c-dev
i2c: __must_check fixes (i2c-dev)
Check for error on sysfs file creation.
Check for error on device creation.
Delete sysfs file on device destruction.
I couldn't test this one beyond compilation, as it applies on top of
another patch in Greg's tree [1] which breaks all my systems when I
apply it (my udev isn't recent enough.) Anyone with bleeding edge udev
is welcome to test and report.
[1] http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/i2c/i2c-dev-device.patch
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index 2ce0833..567fb05 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -406,6 +406,7 @@
static int i2cdev_attach_adapter(struct i2c_adapter *adap)
{
struct i2c_dev *i2c_dev;
+ int res;
i2c_dev = get_free_i2c_dev(adap);
if (IS_ERR(i2c_dev))
@@ -419,14 +420,20 @@
MKDEV(I2C_MAJOR, adap->nr),
&adap->dev, "i2c-%d",
adap->nr);
- if (!i2c_dev->class_dev)
+ if (!i2c_dev->class_dev) {
+ res = -ENODEV;
goto error;
- class_device_create_file(i2c_dev->class_dev, &class_device_attr_name);
+ }
+ res = class_device_create_file(i2c_dev->class_dev, &class_device_attr_name);
+ if (res)
+ goto error_destroy;
return 0;
+error_destroy:
+ class_device_destroy(i2c_dev_class, MKDEV(I2C_MAJOR, adap->nr));
error:
return_i2c_dev(i2c_dev);
kfree(i2c_dev);
- return -ENODEV;
+ return res;
}
static int i2cdev_detach_adapter(struct i2c_adapter *adap)
@@ -437,6 +444,7 @@
if (!i2c_dev)
return -ENODEV;
+ class_device_remove_file(i2c_dev->class_dev, &class_device_attr_name);
return_i2c_dev(i2c_dev);
class_device_destroy(i2c_dev_class, MKDEV(I2C_MAJOR, adap->nr));
kfree(i2c_dev);