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SubjectRe: [PATCH 1/4] vdpa_sim: Fix return value check for vdpa_alloc_device()
On Thu, Jul 15, 2021 at 04:00:23PM +0800, Xie Yongji wrote:
>The vdpa_alloc_device() returns an error pointer upon
>failure, not NULL. To handle the failure correctly, this
>replaces NULL check with IS_ERR() check and propagate the
>error upwards.
>
>Fixes: 2c53d0f64c06 ("vdpasim: vDPA device simulator")
>Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
>Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
>---
> drivers/vdpa/vdpa_sim/vdpa_sim.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
>index 14e024de5cbf..c621cf7feec0 100644
>--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
>+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
>@@ -251,8 +251,10 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *dev_attr)
>
> vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops,
> dev_attr->name);
>- if (!vdpasim)
>+ if (IS_ERR(vdpasim)) {
>+ ret = PTR_ERR(vdpasim);
> goto err_alloc;
>+ }
>
> vdpasim->dev_attr = *dev_attr;
> INIT_WORK(&vdpasim->work, dev_attr->work_fn);
>--
>2.11.0
>

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

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