[PATCH] rio: warn_unused_result warnings fix

Michael Ellerman michael at ellerman.id.au
Tue Apr 28 20:51:22 EST 2009


On Tue, 2009-04-28 at 18:15 +0800, Li Yang wrote:
> warning: ignoring return value of 'device_add', declared with attribute warn_unused_result
> warning: ignoring return value of 'sysfs_create_bin_file', declared with attribute warn_unused_result
> 
> Signed-off-by: Li Yang <leoli at freescale.com>
> ---
>  drivers/rapidio/rio-scan.c  |    5 ++++-
>  drivers/rapidio/rio-sysfs.c |    6 ++++--
>  2 files changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c
> index 74d0bfa..9309e24 100644
> --- a/drivers/rapidio/rio-scan.c
> +++ b/drivers/rapidio/rio-scan.c
> @@ -265,7 +265,10 @@ static void rio_route_set_ops(struct rio_dev *rdev)
>   */
>  static void __devinit rio_add_device(struct rio_dev *rdev)
>  {
> -	device_add(&rdev->dev);
> +	int err;
> +
> +	err = device_add(&rdev->dev);
> +	WARN_ON(err);
>  
>  	spin_lock(&rio_global_list_lock);
>  	list_add_tail(&rdev->global_list, &rio_devices);

Is that really useful? Why not return the error to rio_setup_device()
which can tell it's caller.

cheers
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 197 bytes
Desc: This is a digitally signed message part
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20090428/a8f29639/attachment.pgp>


More information about the Linuxppc-dev mailing list