Hi Prabhakar,
Thanks for the patch.
On Thursday 03 January 2013 18:52:42 Lad, Prabhakar wrote:
> I2C drivers can use devm_kzalloc() too in their .probe() methods. Doing so
> simplifies their clean up paths.
>
> Signed-off-by: Lad, Prabhakar <prabhakar....@ti.com>
> Signed-off-by: Manjunath Hadli <manjunath.ha...@ti.com>
> ---
> drivers/media/i2c/tvp7002.c | 10 ++--------
> 1 files changed, 2 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/media/i2c/tvp7002.c b/drivers/media/i2c/tvp7002.c
> index fb6a5b5..2d4c86e 100644
> --- a/drivers/media/i2c/tvp7002.c
> +++ b/drivers/media/i2c/tvp7002.c
> @@ -1036,7 +1036,7 @@ static int tvp7002_probe(struct i2c_client *c, const
> struct i2c_device_id *id) return -ENODEV;
> }
>
> - device = kzalloc(sizeof(struct tvp7002), GFP_KERNEL);
> + device = devm_kzalloc(&c->dev, sizeof(struct tvp7002), GFP_KERNEL);
>
> if (!device)
> return -ENOMEM;
> @@ -1088,17 +1088,12 @@ static int tvp7002_probe(struct i2c_client *c, const
> struct i2c_device_id *id) V4L2_CID_GAIN, 0, 255, 1, 0);
> sd->ctrl_handler = &device->hdl;
> if (device->hdl.error) {
> - int err = device->hdl.error;
> -
> v4l2_ctrl_handler_free(&device->hdl);
> - kfree(device);
> - return err;
> + return device->hdl.error;
At this point device->hdl as been freed (or rather uninitialized, as the
structure is not dynamically allocated by the control framework), so device-
>hdl.error is undefined. That's why you need the local err variable.
> }
> v4l2_ctrl_handler_setup(&device->hdl);
>
> found_error:
> - if (error < 0)
> - kfree(device);
You can remove the found_error label and return errors directly instead of
using goto's.
> return error;
And this can then be turned into return 0.
> }
> @@ -1120,7 +1115,6 @@ static int tvp7002_remove(struct i2c_client *c)
>
> v4l2_device_unregister_subdev(sd);
> v4l2_ctrl_handler_free(&device->hdl);
> - kfree(device);
> return 0;
> }
--
Regards,
Laurent Pinchart
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