diff options
| author | Zhu Lingshan <lingshan.zhu@intel.com> | 2022-07-22 14:53:07 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-08-11 11:26:08 +0300 |
| commit | a34bed37fc9d3da319bb75dfbf02a7d3e95e12de (patch) | |
| tree | 1a1229f26fb6a72fc42b1bc3412ef2e6140ced04 /drivers/vdpa/vdpa.c | |
| parent | 378b2e956820ff5c082d05f42828badcfbabb614 (diff) | |
| download | linux-a34bed37fc9d3da319bb75dfbf02a7d3e95e12de.tar.xz | |
vDPA: !FEATURES_OK should not block querying device config space
Users may want to query the config space of a vDPA device,
to choose a appropriate one for a certain guest. This means the
users need to read the config space before FEATURES_OK, and
the existence of config space contents does not depend on
FEATURES_OK.
The spec says:
The device MUST allow reading of any device-specific configuration
field before FEATURES_OK is set by the driver. This includes
fields which are conditional on feature bits, as long as those
feature bits are offered by the device.
Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20220722115309.82746-5-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa/vdpa.c')
| -rw-r--r-- | drivers/vdpa/vdpa.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index ebf2f363fbe7..0e99b20e942e 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -846,17 +846,9 @@ vdpa_dev_config_fill(struct vdpa_device *vdev, struct sk_buff *msg, u32 portid, { u32 device_id; void *hdr; - u8 status; int err; down_read(&vdev->cf_lock); - status = vdev->config->get_status(vdev); - if (!(status & VIRTIO_CONFIG_S_FEATURES_OK)) { - NL_SET_ERR_MSG_MOD(extack, "Features negotiation not completed"); - err = -EAGAIN; - goto out; - } - hdr = genlmsg_put(msg, portid, seq, &vdpa_nl_family, flags, VDPA_CMD_DEV_CONFIG_GET); if (!hdr) { |