linux-kernel - [PATCH 1/4] vdpa_sim: switch to use __vdpa_alloc

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Date:   Wed, 21 Dec 2022 14:16:49 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     mst@...hat.com, jasowang@...hat.com
Cc:     sgarzare@...hat.com, eperezma@...hat.com,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] vdpa_sim: switch to use __vdpa_alloc_device()

This allows us to control the allocation size of the structure.

Signed-off-by: Jason Wang <jasowang@...hat.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index b071f0d842fb..757afef86ba0 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -250,6 +250,7 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr,
 			       const struct vdpa_dev_set_config *config)
 {
 	const struct vdpa_config_ops *ops;
+	struct vdpa_device *vdpa;
 	struct vdpasim *vdpasim;
 	struct device *dev;
 	int i, ret = -ENOMEM;
@@ -267,14 +268,16 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr,
 	else
 		ops = &vdpasim_config_ops;
 
-	vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops,
-				    dev_attr->ngroups, dev_attr->nas,
-				    dev_attr->name, false);
-	if (IS_ERR(vdpasim)) {
-		ret = PTR_ERR(vdpasim);
+	vdpa = __vdpa_alloc_device(NULL, ops,
+				   dev_attr->ngroups, dev_attr->nas,
+				   sizeof(struct vdpasim),
+				   dev_attr->name, false);
+	if (IS_ERR(vdpa)) {
+		ret = PTR_ERR(vdpa);
 		goto err_alloc;
 	}
 
+	vdpasim = vdpa_to_sim(vdpa);
 	vdpasim->dev_attr = *dev_attr;
 	INIT_WORK(&vdpasim->work, dev_attr->work_fn);
 	spin_lock_init(&vdpasim->lock);
-- 
2.25.1