From: Jason Wang <jasowang@redhat.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
intel-gfx@lists.freedesktop.org,
intel-gvt-dev@lists.freedesktop.org, kwankhede@nvidia.com,
mst@redhat.com, tiwei.bie@intel.com,
virtualization@lists.linux-foundation.org,
netdev@vger.kernel.org, cohuck@redhat.com,
maxime.coquelin@redhat.com, cunming.liang@intel.com,
zhihong.wang@intel.com, rob.miller@broadcom.com,
xiao.w.wang@intel.com, haotian.wang@sifive.com,
zhenyuw@linux.intel.com, zhi.a.wang@intel.com,
jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com,
rodrigo.vivi@intel.com, airlied@linux.ie, daniel@ffwll.ch,
farman@linux.ibm.com, pasic@linux.ibm.com, sebott@linux.ibm.com,
oberpar@linux.ibm.com, heiko.carstens@de.ibm.com,
gor@linux.ibm.com, borntraeger@de.ibm.com,
akrowiak@linux.ibm.com, freude@linux.ibm.com,
lingshan.zhu@intel.com, idos@mellanox.com, eperezma@redhat.com,
lulu@redhat.com, parav@mellanox.com,
christophe.de.dinechin@gmail.com, kevin.tian@intel.com
Subject: Re: [PATCH V3 1/7] mdev: class id support
Date: Wed, 16 Oct 2019 12:38:49 +0800 [thread overview]
Message-ID: <3f6121a9-7d25-df8d-86ec-14443ab036f6@redhat.com> (raw)
In-Reply-To: <20191015103806.0538ccb2@x1.home>
On 2019/10/16 上午12:38, Alex Williamson wrote:
> On Fri, 11 Oct 2019 16:15:51 +0800
> Jason Wang <jasowang@redhat.com> wrote:
>
>> diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
>> index b558d4cfd082..724e9b9841d8 100644
>> --- a/drivers/vfio/mdev/mdev_core.c
>> +++ b/drivers/vfio/mdev/mdev_core.c
>> @@ -45,6 +45,12 @@ void mdev_set_drvdata(struct mdev_device *mdev, void *data)
>> }
>> EXPORT_SYMBOL(mdev_set_drvdata);
>>
>> +void mdev_set_class(struct mdev_device *mdev, u16 id)
>> +{
>> + mdev->class_id = id;
>> +}
>> +EXPORT_SYMBOL(mdev_set_class);
>> +
>> struct device *mdev_dev(struct mdev_device *mdev)
>> {
>> return &mdev->dev;
>> @@ -135,6 +141,7 @@ static int mdev_device_remove_cb(struct device *dev, void *data)
>> * mdev_register_device : Register a device
>> * @dev: device structure representing parent device.
>> * @ops: Parent device operation structure to be registered.
>> + * @id: class id.
>> *
>> * Add device to list of registered parent devices.
>> * Returns a negative value on error, otherwise 0.
>> @@ -324,6 +331,9 @@ int mdev_device_create(struct kobject *kobj,
>> if (ret)
>> goto ops_create_fail;
>>
>> + if (!mdev->class_id)
> This is a sanity test failure of the parent driver on a privileged
> path, I think it's fair to print a warning when this occurs rather than
> only return an errno to the user. In fact, ret is not set to an error
> value here, so it looks like this fails to create the device but
> returns success. Thanks,
>
> Alex
Will fix.
Thanks
>
>> + goto class_id_fail;
>> +
>> ret = device_add(&mdev->dev);
>> if (ret)
>> goto add_fail;
>> @@ -340,6 +350,7 @@ int mdev_device_create(struct kobject *kobj,
>>
>> sysfs_fail:
>> device_del(&mdev->dev);
>> +class_id_fail:
>> add_fail:
>> parent->ops->remove(mdev);
>> ops_create_fail:
next prev parent reply other threads:[~2019-10-16 4:41 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-11 8:15 [PATCH V3 0/7] mdev based hardware virtio offloading support Jason Wang
2019-10-11 8:15 ` [PATCH V3 1/7] mdev: class id support Jason Wang
2019-10-15 10:26 ` Cornelia Huck
2019-10-15 12:12 ` Jason Wang
2019-10-15 16:38 ` Alex Williamson
2019-10-16 4:38 ` Jason Wang [this message]
2019-10-16 4:57 ` Parav Pandit
2019-10-16 10:37 ` Jason Wang
2019-10-17 8:27 ` Jason Wang
2019-10-11 8:15 ` [PATCH V3 2/7] mdev: bus uevent support Jason Wang
2019-10-15 10:27 ` Cornelia Huck
2019-10-15 12:13 ` Jason Wang
2019-10-16 5:06 ` Parav Pandit
2019-10-11 8:15 ` [PATCH V3 3/7] modpost: add support for mdev class id Jason Wang
2019-10-11 8:15 ` [PATCH V3 4/7] mdev: introduce device specific ops Jason Wang
2019-10-15 10:41 ` Cornelia Huck
2019-10-15 12:17 ` Jason Wang
2019-10-15 17:26 ` Alex Williamson
2019-10-11 8:15 ` [PATCH V3 5/7] mdev: introduce virtio device and its device ops Jason Wang
2019-10-14 17:23 ` Stefan Hajnoczi
2019-10-15 3:27 ` Jason Wang
2019-10-11 8:15 ` [PATCH V3 6/7] virtio: introduce a mdev based transport Jason Wang
2019-10-14 17:39 ` Stefan Hajnoczi
2019-10-15 3:29 ` Jason Wang
2019-10-11 8:15 ` [PATCH V3 7/7] docs: sample driver to demonstrate how to implement virtio-mdev framework Jason Wang
2019-10-14 17:49 ` [PATCH V3 0/7] mdev based hardware virtio offloading support Stefan Hajnoczi
2019-10-15 3:37 ` Jason Wang
2019-10-15 14:37 ` Stefan Hajnoczi
2019-10-17 1:42 ` Jason Wang
2019-10-17 9:43 ` Stefan Hajnoczi
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