linux-kernel - [PATCH V4 linux-next 01/12] vhost-vdpa: refine ioctl pre-processing

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Message-Id: <20200804162048.22587-2-eli@mellanox.com>
Date:   Tue,  4 Aug 2020 19:20:37 +0300
From:   Eli Cohen <eli@...lanox.com>
To:     mst@...hat.com, jasowang@...hat.com,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Cc:     shahafs@...lanox.com, saeedm@...lanox.com, parav@...lanox.com
Subject: [PATCH V4 linux-next 01/12] vhost-vdpa: refine ioctl pre-processing

From: Jason Wang <jasowang@...hat.com>

Switch to use 'switch' to make the codes more easier to be extended.

Signed-off-by: Jason Wang <jasowang@...hat.com>
---
 drivers/vhost/vdpa.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 16e0ffb115be..563ae6204052 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -377,15 +377,16 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd,
 	idx = array_index_nospec(idx, v->nvqs);
 	vq = &v->vqs[idx];
 
-	if (cmd == VHOST_VDPA_SET_VRING_ENABLE) {
+	switch (cmd) {
+	case VHOST_VDPA_SET_VRING_ENABLE:
 		if (copy_from_user(&s, argp, sizeof(s)))
 			return -EFAULT;
 		ops->set_vq_ready(vdpa, idx, s.num);
 		return 0;
-	}
-
-	if (cmd == VHOST_GET_VRING_BASE)
+	case VHOST_GET_VRING_BASE:
 		vq->last_avail_idx = ops->get_vq_state(v->vdpa, idx);
+		break;
+	}
 
 	r = vhost_vring_ioctl(&v->vdev, cmd, argp);
 	if (r)
-- 
2.26.0