linux-kernel - [PATCH] rpmsg: virtio_rpmsg_bus: use dev_warn

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Date:   Tue, 28 Sep 2021 16:29:02 +0300
From:   Alexandru Ardelean <ardeleanalex@...il.com>
To:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     ohad@...ery.com, bjorn.andersson@...aro.org,
        mathieu.poirier@...aro.org,
        Alexandru Ardelean <ardeleanalex@...il.com>
Subject: [PATCH] rpmsg: virtio_rpmsg_bus: use dev_warn_ratelimited for msg with no recipient

From: Alexandru Ardelean <ardeleanalex@...il.com>

Even though it may be user-space's fault for this error (some application
terminated or crashed without cleaning up it's endpoint), the rpmsg
communication should not overflow the syslog with too many messages.

A dev_warn_ratelimited() seems like a good alternative in case this can
occur.

Signed-off-by: Alexandru Ardelean <ardeleanalex@...il.com>
---
 drivers/rpmsg/virtio_rpmsg_bus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index 8e49a3bacfc7..546f0fb66f1d 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -749,7 +749,7 @@ static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev,
 		/* farewell, ept, we don't need you anymore */
 		kref_put(&ept->refcount, __ept_release);
 	} else
-		dev_warn(dev, "msg received with no recipient\n");
+		dev_warn_ratelimited(dev, "msg received with no recipient\n");
 
 	/* publish the real size of the buffer */
 	rpmsg_sg_init(&sg, msg, vrp->buf_size);
-- 
2.31.1