Re: [PATCH] vfio/ap: Use g_autofree variable

[Anthony Krowiak <akrowiak@linux.ibm.com>]

On 4/24/24 8:54 AM, Cédric Le Goater wrote:
> Also change the return value of vfio_ap_register_irq_notifier() to be
> a bool since it takes and 'Error **' argument. See the qapi/error.h
> Rules section.


LGTM

Signed-off-by: Anthony Krowiak <akrowiak@linux.ibm.com>


>
> Signed-off-by: Cédric Le Goater <clg@redhat.com>
> ---
>   hw/vfio/ap.c | 19 ++++++++-----------
>   1 file changed, 8 insertions(+), 11 deletions(-)
>
> diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c
> index 7c4caa5938636937680fec87e999249ac84a4498..8bb024e2fde4a1d72346dee4b662d762374326b9 100644
> --- a/hw/vfio/ap.c
> +++ b/hw/vfio/ap.c
> @@ -70,14 +70,14 @@ static void vfio_ap_req_notifier_handler(void *opaque)
>       }
>   }
>   
> -static void vfio_ap_register_irq_notifier(VFIOAPDevice *vapdev,
> +static bool vfio_ap_register_irq_notifier(VFIOAPDevice *vapdev,
>                                             unsigned int irq, Error **errp)
>   {
>       int fd;
>       size_t argsz;
>       IOHandler *fd_read;
>       EventNotifier *notifier;
> -    struct vfio_irq_info *irq_info;
> +    g_autofree struct vfio_irq_info *irq_info = NULL;
>       VFIODevice *vdev = &vapdev->vdev;
>   
>       switch (irq) {
> @@ -87,13 +87,13 @@ static void vfio_ap_register_irq_notifier(VFIOAPDevice *vapdev,
>           break;
>       default:
>           error_setg(errp, "vfio: Unsupported device irq(%d)", irq);
> -        return;
> +        return false;
>       }
>   
>       if (vdev->num_irqs < irq + 1) {
>           error_setg(errp, "vfio: IRQ %u not available (number of irqs %u)",
>                      irq, vdev->num_irqs);
> -        return;
> +        return false;
>       }
>   
>       argsz = sizeof(*irq_info);
> @@ -104,14 +104,14 @@ static void vfio_ap_register_irq_notifier(VFIOAPDevice *vapdev,
>       if (ioctl(vdev->fd, VFIO_DEVICE_GET_IRQ_INFO,
>                 irq_info) < 0 || irq_info->count < 1) {
>           error_setg_errno(errp, errno, "vfio: Error getting irq info");
> -        goto out_free_info;
> +        return false;
>       }
>   
>       if (event_notifier_init(notifier, 0)) {
>           error_setg_errno(errp, errno,
>                            "vfio: Unable to init event notifier for irq (%d)",
>                            irq);
> -        goto out_free_info;
> +        return false;
>       }
>   
>       fd = event_notifier_get_fd(notifier);
> @@ -123,9 +123,7 @@ static void vfio_ap_register_irq_notifier(VFIOAPDevice *vapdev,
>           event_notifier_cleanup(notifier);
>       }
>   
> -out_free_info:
> -    g_free(irq_info);
> -
> +    return true;
>   }
>   
>   static void vfio_ap_unregister_irq_notifier(VFIOAPDevice *vapdev,
> @@ -171,8 +169,7 @@ static void vfio_ap_realize(DeviceState *dev, Error **errp)
>           goto error;
>       }
>   
> -    vfio_ap_register_irq_notifier(vapdev, VFIO_AP_REQ_IRQ_INDEX, &err);
> -    if (err) {
> +    if (!vfio_ap_register_irq_notifier(vapdev, VFIO_AP_REQ_IRQ_INDEX, &err)) {
>           /*
>            * Report this error, but do not make it a failing condition.
>            * Lack of this IRQ in the host does not prevent normal operation.