| Message ID | 1591352835-22441-3-git-send-email-lingshan.zhu@intel.com |
|---|---|
| State | New |
| Headers | show |
| Series | [RESEND,1/5] ifcvf: move IRQ request/free to status change handlers | expand |
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c index d529ed6..63a6366 100644 --- a/drivers/vdpa/ifcvf/ifcvf_main.c +++ b/drivers/vdpa/ifcvf/ifcvf_main.c @@ -179,6 +179,9 @@ static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status) adapter = dev_get_drvdata(vdpa_dev->dev.parent); status_old = ifcvf_get_status(vf); + if (status_old == status) + return; + if ((status_old & VIRTIO_CONFIG_S_DRIVER_OK) && !(status & VIRTIO_CONFIG_S_DRIVER_OK)) { ifcvf_stop_datapath(adapter);
User space may try to set status of same value for multiple times, this patch can handle this case more efficiently by ignoring the same value of status settings. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> --- drivers/vdpa/ifcvf/ifcvf_main.c | 3 +++ 1 file changed, 3 insertions(+)