linux-kernel - [PATCH v2 2/4] vdpa: accept VHOST_BACKEND_F_ENABLE_AFTER_DRIVER

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Date:   Fri,  9 Jun 2023 11:21:25 +0200
From:   Eugenio Pérez <eperezma@...hat.com>
To:     mst@...hat.com, Jason Wang <jasowang@...hat.com>
Cc:     Zhu Lingshan <lingshan.zhu@...el.com>,
        virtualization@...ts.linux-foundation.org,
        "Gonglei (Arei)" <arei.gonglei@...wei.com>, longpeng2@...wei.com,
        Lei Yang <leiyang@...hat.com>,
        Parav Pandit <parav@...lanox.com>,
        Gautam Dawar <gdawar@...inx.com>,
        Dragos Tatulea <dtatulea@...dia.com>,
        Laurent Vivier <lvivier@...hat.com>, linux-api@...r.kernel.org,
        Liuxiangdong <liuxiangdong5@...wei.com>,
        linux-kernel@...r.kernel.org, alvaro.karsz@...id-run.com,
        Shannon Nelson <snelson@...sando.io>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Cindy Lu <lulu@...hat.com>, si-wei.liu@...cle.com,
        Harpreet Singh Anand <hanand@...inx.com>
Subject: [PATCH v2 2/4] vdpa: accept VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK backend feature

Accepting VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK backend feature if
userland sets it.

Signed-off-by: Eugenio Pérez <eperezma@...hat.com>
Acked-by: Shannon Nelson <shannon.nelson@....com>
---
 drivers/vhost/vdpa.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index bf77924d5b60..a3204406b73d 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -680,7 +680,8 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
 			return -EFAULT;
 		if (features & ~(VHOST_VDPA_BACKEND_FEATURES |
 				 BIT_ULL(VHOST_BACKEND_F_SUSPEND) |
-				 BIT_ULL(VHOST_BACKEND_F_RESUME)))
+				 BIT_ULL(VHOST_BACKEND_F_RESUME) |
+				 BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK)))
 			return -EOPNOTSUPP;
 		if ((features & BIT_ULL(VHOST_BACKEND_F_SUSPEND)) &&
 		     !vhost_vdpa_can_suspend(v))
-- 
2.31.1