linux-kernel - [PATCH 1/1] virtio_balloon: do not set pr_dev

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Message-ID: <20251209212311.64885-1-dongli.zhang@oracle.com>
Date: Tue,  9 Dec 2025 13:23:11 -0800
From: Dongli Zhang <dongli.zhang@...cle.com>
To: virtualization@...ts.linux.dev
Cc: david@...nel.org, jasowang@...hat.com, xuanzhuo@...ux.alibaba.com,
        eperezma@...hat.com, linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] virtio_balloon: do not set pr_dev_info.report unconditionally

Do not set vb->pr_dev_info.report unconditionally if
VIRTIO_BALLOON_F_REPORTING is not available.

Signed-off-by: Dongli Zhang <dongli.zhang@...cle.com>
---
 drivers/virtio/virtio_balloon.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 74fe59f5a78c..0c39f2415324 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -1034,7 +1034,6 @@ static int virtballoon_probe(struct virtio_device *vdev)
 				 poison_val, &poison_val);
 	}
 
-	vb->pr_dev_info.report = virtballoon_free_page_report;
 	if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_REPORTING)) {
 		unsigned int capacity;
 
@@ -1044,6 +1043,8 @@ static int virtballoon_probe(struct virtio_device *vdev)
 			goto out_unregister_oom;
 		}
 
+		vb->pr_dev_info.report = virtballoon_free_page_report;
+
 		/*
 		 * The default page reporting order is @pageblock_order, which
 		 * corresponds to 512MB in size on ARM64 when 64KB base page
-- 
2.39.3