Jason Wang
2020-Jul-21 05:34 UTC
[PATCH V2 vhost next 06/10] vdpa: Modify get_vq_state() to return error code
On 2020/7/20 ??3:14, Eli Cohen wrote:> Modify get_vq_state() so it returns an error code. In case of hardware > acceleration, the available index may be retrieved from the device, an > operation that can possibly fail. > > Reviewed-by: Parav Pandit <parav at mellanox.com> > Signed-off-by: Eli Cohen <eli at mellanox.com>Acked-by: Jason Wang <jasowang at redhat.com>> --- > drivers/vdpa/ifcvf/ifcvf_main.c | 5 +++-- > drivers/vdpa/vdpa_sim/vdpa_sim.c | 5 +++-- > drivers/vhost/vdpa.c | 5 ++++- > include/linux/vdpa.h | 4 ++-- > 4 files changed, 12 insertions(+), 7 deletions(-) > > diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c > index 69032ee97824..d9b5f465ac81 100644 > --- a/drivers/vdpa/ifcvf/ifcvf_main.c > +++ b/drivers/vdpa/ifcvf/ifcvf_main.c > @@ -235,12 +235,13 @@ static u16 ifcvf_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev) > return IFCVF_QUEUE_MAX; > } > > -static void ifcvf_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid, > - struct vdpa_vq_state *state) > +static int ifcvf_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid, > + struct vdpa_vq_state *state) > { > struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev); > > state->avail_index = ifcvf_get_vq_state(vf, qid); > + return 0; > } > > static int ifcvf_vdpa_set_vq_state(struct vdpa_device *vdpa_dev, u16 qid, > diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c > index 599519039f8d..ddf6086d43c2 100644 > --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c > +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c > @@ -427,14 +427,15 @@ static int vdpasim_set_vq_state(struct vdpa_device *vdpa, u16 idx, > return 0; > } > > -static void vdpasim_get_vq_state(struct vdpa_device *vdpa, u16 idx, > - struct vdpa_vq_state *state) > +static int vdpasim_get_vq_state(struct vdpa_device *vdpa, u16 idx, > + struct vdpa_vq_state *state) > { > struct vdpasim *vdpasim = vdpa_to_sim(vdpa); > struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx]; > struct vringh *vrh = &vq->vring; > > state->avail_index = vrh->last_avail_idx; > + return 0; > } > > static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa) > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index af98c11c9d26..fadad74f882e 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -360,7 +360,10 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, > } > > if (cmd == VHOST_GET_VRING_BASE) { > - ops->get_vq_state(v->vdpa, idx, &vq_state); > + r = ops->get_vq_state(v->vdpa, idx, &vq_state); > + if (r) > + return r; > + > vq->last_avail_idx = vq_state.avail_index; > } > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > index 7b088bebffe8..000d71a9f988 100644 > --- a/include/linux/vdpa.h > +++ b/include/linux/vdpa.h > @@ -185,8 +185,8 @@ struct vdpa_config_ops { > bool (*get_vq_ready)(struct vdpa_device *vdev, u16 idx); > int (*set_vq_state)(struct vdpa_device *vdev, u16 idx, > const struct vdpa_vq_state *state); > - void (*get_vq_state)(struct vdpa_device *vdev, u16 idx, > - struct vdpa_vq_state *state); > + int (*get_vq_state)(struct vdpa_device *vdev, u16 idx, > + struct vdpa_vq_state *state); > struct vdpa_notification_area > (*get_vq_notification)(struct vdpa_device *vdev, u16 idx); >
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