linux-kernel - Re: [PATCHv1 4/7] vfio/mdev: Avoid masking error code to EBUSY

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Date:   Mon, 1 Apr 2019 19:21:15 +0200
From:   Cornelia Huck <cohuck@...hat.com>
To:     Parav Pandit <parav@...lanox.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        kwankhede@...dia.com, alex.williamson@...hat.com, cjia@...dia.com
Subject: Re: [PATCHv1 4/7] vfio/mdev: Avoid masking error code to EBUSY

On Tue, 26 Mar 2019 22:45:42 -0500
Parav Pandit <parav@...lanox.com> wrote:

> Instead of masking return error to -EBUSY, return actual error
> returned by the driver.
> 
> Reviewed-by: Maxim Levitsky <mlevitsk@...hat.com>
> Signed-off-by: Parav Pandit <parav@...lanox.com>
> ---
>  drivers/vfio/mdev/mdev_core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
> index 00ca613..836d319 100644
> --- a/drivers/vfio/mdev/mdev_core.c
> +++ b/drivers/vfio/mdev/mdev_core.c
> @@ -141,7 +141,7 @@ static int mdev_device_remove_ops(struct mdev_device *mdev, bool force_remove)
>  	 */
>  	ret = parent->ops->remove(mdev);
>  	if (ret && !force_remove)
> -		return -EBUSY;
> +		return ret;
>  
>  	sysfs_remove_groups(&mdev->dev.kobj, parent->ops->mdev_attr_groups);
>  	return 0;

Makes sense, even if no current ->remove callback returns anything
other than 0 or -EBUSY.

Reviewed-by: Cornelia Huck <cohuck@...hat.com>