[PATCH V4 9/9] virtio: use WARN_ON() to warning illegal status value

From: Jason Wang <jasowang@redhat.com>
To: jasowang@redhat.com, mst@redhat.com,
	virtualization@lists.linux-foundation.org,
	linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de, peterz@infradead.org, paulmck@kernel.org,
	maz@kernel.org, pasic@linux.ibm.com, cohuck@redhat.com,
	eperezma@redhat.com, lulu@redhat.com, sgarzare@redhat.com,
	xuanzhuo@linux.alibaba.com
Subject: [PATCH V4 9/9] virtio: use WARN_ON() to warning illegal status value
Date: Sat,  7 May 2022 15:19:54 +0800	[thread overview]
Message-ID: <20220507071954.14455-10-jasowang@redhat.com> (raw)
In-Reply-To: <20220507071954.14455-1-jasowang@redhat.com>

We used to use BUG_ON() in virtio_device_ready() to detect illegal
status value, this seems sub-optimal since the value is under the
control of the device. Switch to use WARN_ON() instead.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Halil Pasic <pasic@linux.ibm.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 include/linux/virtio_config.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 23f1694cdbd5..5d539f39f7ee 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -255,7 +255,7 @@ void virtio_device_ready(struct virtio_device *dev)
 {
 	unsigned status = dev->config->get_status(dev);
 
-	BUG_ON(status & VIRTIO_CONFIG_S_DRIVER_OK);
+	WARN_ON(status & VIRTIO_CONFIG_S_DRIVER_OK);
 
 	/*
 	 * The virtio_synchronize_cbs() makes sure vring_interrupt()
-- 
2.25.1

