Messages in this thread | | | From | Angus Chen <> | Subject | RE: [PATCH] virtio_pci: modify ENOENT to EINVAL | Date | Thu, 10 Nov 2022 03:30:59 +0000 |
| |
Hi Jason.
> -----Original Message----- > From: Jason Wang <jasowang@redhat.com> > Sent: Wednesday, November 2, 2022 1:34 PM > To: Angus Chen <angus.chen@jaguarmicro.com> > Cc: mst@redhat.com; virtualization@lists.linux-foundation.org; > linux-kernel@vger.kernel.org; lingshan.zhu@intel.com > Subject: Re: [PATCH] virtio_pci: modify ENOENT to EINVAL > > On Tue, Nov 1, 2022 at 7:17 PM Angus Chen <angus.chen@jaguarmicro.com> > wrote: > > > > Virtio_crypto use max_data_queues+1 to setup vqs, > > we use vp_modern_get_num_queues to protect the vq range in setup_vq. > > We could enter index >= vp_modern_get_num_queues(mdev) in setup_vq > > if common->num_queues is not set well,and it return -ENOENT. > > It is better to use -EINVAL instead. > > I'm not sure I get this. It would be better to describe: > > 1) what kind of issues can we see if we return -ENOENT > 2) why -EINVAL can help in this case > > Thanks Thank you for your reply. We use a robot to test our dpu to get the return value of probe. We often get ENOENT form ' setup_vq ' function because of device error. Most of time, my device can't handle queue_enable well. This time,we get 'ENOENT' because the device set max_data_queues bigger than num_queues.
I think EINVAL is used when the value of some parameter is wrong. Btw,it not a big deal,I can modify the robot to workaround.
> > > > > Signed-off-by: Angus Chen <angus.chen@jaguarmicro.com> > > --- > > drivers/virtio/virtio_pci_modern.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/virtio/virtio_pci_modern.c > b/drivers/virtio/virtio_pci_modern.c > > index c3b9f2761849..edf2e18014cd 100644 > > --- a/drivers/virtio/virtio_pci_modern.c > > +++ b/drivers/virtio/virtio_pci_modern.c > > @@ -303,7 +303,7 @@ static struct virtqueue *setup_vq(struct > virtio_pci_device *vp_dev, > > int err; > > > > if (index >= vp_modern_get_num_queues(mdev)) > > - return ERR_PTR(-ENOENT); > > + return ERR_PTR(-EINVAL); > > > > /* Check if queue is either not available or already active. */ > > num = vp_modern_get_queue_size(mdev, index); > > -- > > 2.25.1 > >
| |