drm/hyperv: Add ratelimit on error message

Due to a full ring buffer, the driver may be unable to send updates to
the Hyper-V host.  But outputing the error message can make the problem
worse because console output is also typically written to the frame
buffer.
Rate limiting the error message, also output the error code for additional
diagnosability.

Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1662736193-31379-1-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>

diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_proto.c b/drivers/gpu/drm/hyperv/hyperv_drm_proto.c
index 76a182a9a7654736c175c7eac9d3b814c815bb2a..013a7829182df80748b55082abc8f0c30a5aaebe 100644 (file)
--- a/drivers/gpu/drm/hyperv/hyperv_drm_proto.c
+++ b/drivers/gpu/drm/hyperv/hyperv_drm_proto.c
@@ -208,7 +208,7 @@ static inline int hyperv_sendpacket(struct hv_device *hdev, struct synthvid_msg
                               VM_PKT_DATA_INBAND, 0);
 
        if (ret)
-               drm_err(&hv->dev, "Unable to send packet via vmbus\n");
+               drm_err_ratelimited(&hv->dev, "Unable to send packet via vmbus; error %d\n", ret);
 
        return ret;
 }